Forem: Theo Nguyen

DNS Lookup: The First Tool You Need When Everything Breaks

Theo Nguyen — Fri, 27 Feb 2026 19:02:36 +0000

You know that moment when your website is down, your client is yelling, and you have no idea if it’s a DNS issue or your code finally gave up on life? Yeah. We’ve all been there.

DNS is the internet’s phone book — it translates human-friendly domain names into IP addresses that computers actually understand. And when something goes wrong with DNS, everything breaks. That’s why having a quick, reliable DNS Lookup tool in your back pocket is non-negotiable.

What Does DNS Lookup Actually Do?

A DNS lookup queries the Domain Name System to find records associated with a domain. Think of it as asking the internet: “Hey, where does actually live?”

But it’s not just about IP addresses. DNS records come in several flavors:

A Records — Maps a domain to an IPv4 address. The classic.
AAAA Records — Same thing, but for IPv6 (because we’re running out of IPv4 addresses, remember?).
MX Records — Points to mail servers. Essential if you want emails to actually arrive.
NS Records — Shows which nameservers are authoritative for the domain.
TXT Records — Used for SPF, DKIM, domain verification, and all sorts of sneaky stuff.
CNAME Records — Aliases one domain to another. The “redirect” of the DNS world.
SOA Records — The “source of authority” with zone metadata and refresh timers.

Our DNS Lookup tool lets you query all of these in seconds, powered by Google’s DNS API for fast, reliable results.

When You’ll Actually Need This

Here are some real-world scenarios where a DNS lookup saves the day:

“My site is down!”

First step in any outage: check if DNS is resolving correctly. If the A record is pointing to the wrong IP (or not there at all), you’ve found your culprit before even opening your server logs.

“Emails aren’t being delivered”

MX records misconfigured? SPF record missing from your TXT records? That’s why your carefully crafted emails are landing in spam — or vanishing entirely. A quick DNS check tells you exactly what’s going on.

“I just migrated my domain”

After switching hosts or DNS providers, you want to verify that records propagated correctly. Check your A, CNAME, and NS records to confirm everything is pointing where it should be.

“Is this domain legit?”

Doing some OSINT or checking out a suspicious domain? DNS records can reveal who’s hosting it, what email infrastructure they use, and whether basic security measures are in place.

Why Use Our Tool Instead of the Terminal?

Look, and are great. If you’re already in a terminal, go for it. But sometimes you just want to type a domain and see results — no flags to remember, no output to parse, no “wait, what’s the syntax for MX queries again?”

Our DNS Lookup tool gives you:

Clean table output with name, value, and TTL
Human-readable TTL values (because “3600” means nothing at a glance)
All record types in one place — just select and go
No installation, no CLI, works right in your browser

Pro Tips for DNS Debugging

Check TTL values — If you just changed a record and it’s not working, the old TTL might not have expired yet. Patience, grasshopper.
Verify TXT records — Setting up authentication? Domain verification for Google, Cloudflare, or an email provider usually needs a TXT record.
Look at NS records first — If nameservers are wrong, nothing else matters. Always start here when troubleshooting.
Compare A vs CNAME — Some setups use CNAME for the www subdomain pointing to the root domain’s A record. Make sure both are configured correctly.

Related Tools You Might Like

My IP / IP Lookup — Find your own IP or look up details about any IP address
IPv4 Subnet Calculator — Calculate network ranges, broadcast addresses, and more
URL Parser — Break down URLs into their components
HTTP Status Codes — Quick reference for all those status codes
User Agent Parser — Decode browser and device info from user agent strings

Go Look Something Up

DNS issues don’t fix themselves (unfortunately). Next time something’s broken — or you’re just curious what records a domain has — fire up the DNS Lookup tool and get answers in seconds.

Your future self, mid-outage, will thank you.

DNS Lookup: Because It’s Always DNS

Theo Nguyen — Fri, 27 Feb 2026 19:01:10 +0000

You just deployed your shiny new app, pointed a domain at it, and… nothing loads. You stare at the screen. Is it DNS? It’s always DNS.

Whether you’re debugging a misconfigured domain, verifying MX records before switching email providers, or just being nosy about how a website is set up — you need a quick way to peek under the hood. That’s exactly what our DNS Lookup tool is for.

What Is DNS, Anyway?

DNS (Domain Name System) is basically the internet’s phone book. When you type into your browser, DNS translates that human-friendly name into an IP address like so your computer knows where to go. Without it, you’d be memorizing IP addresses like it’s 1995.

But DNS isn’t just one record. It’s a whole system of different record types, each serving a different purpose:

A – Points a domain to an IPv4 address
AAAA – Same thing, but for IPv6
MX – Mail exchange records (where email goes)
NS – Which nameservers are authoritative for the domain
TXT – Verification records, SPF, DKIM, all the email auth stuff
CNAME – An alias that points to another domain
SOA – Start of Authority, the boss record

When You Actually Need a DNS Lookup

Here are some real-world scenarios where you’ll reach for this tool:

Debugging deployments: Your site isn’t loading after a DNS change? Check if the A record is pointing where you think it is. DNS propagation can take up to 48 hours, but usually it’s much faster. A quick lookup tells you what the world currently sees.

Setting up email: Moving to Google Workspace or Microsoft 365? You need to set MX records correctly, plus TXT records for SPF and DKIM verification. One typo and your emails vanish into the void. Check your records before telling the team it’s done.

Investigating a domain: Curious what CDN a competitor uses? Their CNAME records will usually tell you. Want to know their hosting provider? The A record will point you in the right direction. Pair it with our My IP / IP Lookup tool for even more details.

Security checks: TXT records reveal a lot — SPF policies, DMARC settings, domain verification tokens. If you’re auditing your domain’s security posture, DNS is where you start.

How to Use the DNS Lookup Tool

It’s dead simple:

Head to DNS Lookup
Type in a domain name (like )
Pick the record type you want to query
Hit Lookup

You’ll get a clean table with the record name, value, and TTL (time-to-live) in a human-readable format. No clutter, no ads asking you to buy a VPN. Just the data you need.

The tool uses Google’s public DNS API under the hood, so you’re getting reliable, fast results every time.

Pro Tips

Check multiple record types: Don’t just look at A records. MX, TXT, and NS records tell you a lot more about how a domain is configured.
Verify after changes: After updating DNS, use this tool to confirm the new values are live. Don’t trust your registrar’s dashboard alone — check what the DNS resolvers actually see.
Compare TTLs: Low TTL values (like 300 seconds) mean the domain owner expects frequent changes. High values (like 86400) mean things are stable. This is useful intel when troubleshooting.

Related Tools You Might Like

My IP / IP Lookup – Look up IP addresses and see geolocation data
IPv4 Subnet Calculator – Calculate subnets, CIDR ranges, and network masks
Random Port Generator – Need a port number? We got you
URL Parser – Break down URLs into their components
HTTP Status Codes – The complete cheatsheet for every status code

Stop guessing, start looking. Try the DNS Lookup tool and see exactly what’s going on with any domain — because it’s always DNS.

Unix Timestamps: What They Are and How to Convert Them Instantly

Theo Nguyen — Thu, 26 Feb 2026 19:01:04 +0000

Quick — what time is ? If you just stared blankly, congrats, you’re human. Unix timestamps are the backbone of how computers track time, but they’re about as readable as a phone number in binary.

Whether you’re debugging API responses, parsing log files at 2 AM, or trying to figure out why your database thinks it’s 1970, our Unix Timestamp Converter is here to save your sanity.

What Even Is a Unix Timestamp?

A Unix timestamp (aka epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. That’s it. No time zones, no daylight saving nonsense, no “is it DD/MM or MM/DD?” debates. Just one cold, unambiguous number.

It’s how most servers, databases, and APIs store time under the hood. And honestly? It’s brilliant — until you need to actually read it.

Why You’ll Love This Tool

Our converter doesn’t just do the bare minimum. Here’s what makes it genuinely useful:

Auto-detection — Paste a timestamp and it figures out whether it’s seconds or milliseconds. No more guessing if you need to divide by 1000.
Bidirectional conversion — Go from timestamp → date or date → timestamp. Both directions, one tool.
15+ time zones — See your timestamp in UTC, your local time, Tokyo, London, or wherever your servers live.
Multiple output formats — Local time, UTC, ISO 8601, and relative time (“3 hours ago”) all at once.
“Now” button — Get the current Unix timestamp instantly. Perfect for quick copies into your code.
Live mode — Leave it empty and watch the current time tick in real-time. Oddly satisfying.

Real-World Uses (aka When You’ll Actually Need This)

Debugging API responses: Your endpoint returns and you need to know when that actually was. Paste, convert, done.

Reading log files: Server logs love Unix timestamps. Your eyes don’t. Bridge the gap.

Database queries: Need to filter records between two dates stored as epoch time? Convert your target dates to timestamps and plug them into your WHERE clause.

JWT tokens: The and fields in JWTs are Unix timestamps. Pair this with our JWT Decode tool and you’ve got the full picture.

Cron jobs: Setting up scheduled tasks? Our Cron Expression Generator handles the scheduling, and this tool helps you verify the timing.

The January 1, 1970 Problem

Fun fact: if you’ve ever seen a date show up as “January 1, 1970” in your app, it means someone passed (or ) as a timestamp. It’s the Unix equivalent of “I have no idea what time it is.” Every developer hits this bug at least once. Consider it a rite of passage.

Related Tools You Might Need

Date-Time Format Converter — Convert between date string formats (ISO, RFC, custom patterns)
JWT Decode — Decode JWT tokens that contain Unix timestamps
Cron Expression Generator — Build cron schedules visually
Time Converter — Convert between hours, minutes, seconds, and more
Chronometer — A simple stopwatch when you need to measure elapsed time

Stop Counting Seconds

Life’s too short to manually calculate epoch time. Bookmark the Unix Timestamp Converter, keep it in your dev toolkit, and never squint at a 10-digit number wondering “is that today or 2038?” again.

Now go ship some code. The timestamps can wait.

String Length Calculator: Count Characters, Bytes, and Words Instantly

Theo Nguyen — Wed, 25 Feb 2026 19:00:57 +0000

Ever pasted a bio into Twitter only to discover you’re 12 characters over the limit? Or built a database column as VARCHAR(255) and then wondered if your user’s input actually fits? Yeah, counting characters by hand is nobody’s idea of a good time.

Meet the String Length Calculator — your instant, no-nonsense tool for getting every text stat you could possibly need, updated in real time as you type.

What Does It Actually Do?

Paste in any text and you’ll immediately see:

Character Count — total characters, spaces included
Characters (No Spaces) — because some platforms don’t count whitespace
Byte Count (UTF-8) — crucial for database limits and API payloads
Word Count — for writers, SEO folks, and anyone with a word limit
Line Count — handy for config files, CSVs, and log analysis

Everything updates instantly. No submit button, no page reload, no waiting. Just type and know.

Why Byte Count Matters More Than You Think

Here’s the thing most people miss: character count ≠ byte count. A plain ASCII letter like “A” is 1 byte. But an emoji like can be 4 bytes. And if you’re storing text in a database with a byte-based limit (hello, MySQL’s VARCHAR), you need to know the byte size, not just the character count.

Our String Length Calculator gives you the UTF-8 byte size right alongside the character count, so you’ll never accidentally truncate someone’s emoji-laden username again.

Who Needs This?

Developers: Validating input lengths, checking API payload sizes, debugging encoding issues. You know the drill — a field says “max 100 characters” but the backend actually means 100 bytes.

Writers & Marketers: Twitter bios (160 chars), meta descriptions (~155 chars), SMS messages (160 chars), ad copy limits. The Word Counter is great for longer content, but when you need raw character precision, this is the tool.

Data People: Checking CSV field sizes before import, verifying log line lengths, making sure your data fits the schema. Pair it with the Line Counter for a full text breakdown.

Real-World Scenarios

The SMS Budget Check: Writing an SMS campaign? Standard SMS is 160 characters (or 70 for Unicode). Paste your message in, check the count, and trim before you blow through your messaging credits.

The Database Sanity Check: About to insert a string into a VARCHAR(255) column? Check the byte count first. That “short” Japanese text might be 3x the bytes you expect.

The Commit Message Audit: Git best practices say 50 chars for the subject line. Paste it in. Are you at 50 or 78? Now you know.

Copy Any Stat With One Click

Need to drop the character count into a Jira ticket or Slack message? Each stat has a copy button right next to it. Click, paste, done. No highlighting, no accidental extra spaces.

Related Tools

If you’re working with text, these might come in handy too:

Word Counter — detailed word and reading time stats
Line Counter — count lines in any text or file
Case Converter — uppercase, lowercase, title case in one click
Whitespace Trimmer — clean up messy text fast
Encode Text to Base64 — when you need to see what your string looks like encoded

Go Count Some Strings

Stop guessing, stop counting on your fingers, and definitely stop getting burned by byte vs. character limits. The String Length Calculator is free, instant, and works right in your browser. Go give it a spin.

Stop Squinting at Messy SQL — Format It in Seconds

Theo Nguyen — Tue, 24 Feb 2026 19:00:58 +0000

We’ve all been there. Someone sends you a SQL query that looks like it was written by a cat walking across a keyboard. One enormous line, no indentation, keywords scattered like confetti — and somehow it works. But good luck figuring out how.

Whether you’re debugging a monstrous JOIN, reviewing a colleague’s code, or just trying to make sense of your own queries from three months ago (past you was a menace), properly formatted SQL makes everything easier. That’s where the SQL Formatter comes in.

Why Formatting SQL Actually Matters

Let’s be real — SQL doesn’t care about whitespace. Your database will happily execute a 500-character single-liner without blinking. But you aren’t a database. You’re a human with limited working memory and a deadline.

Formatted SQL gives you:

Readability — Spot WHERE clauses, JOINs, and subqueries at a glance
Easier debugging — Find that missing comma or misplaced parenthesis
Better code reviews — Your teammates will actually thank you
Consistency — Everyone’s SQL looks the same, no matter who wrote it

How It Works

Using the SQL Formatter is dead simple:

Paste your SQL into the input area
Pick your style — 2 spaces, 4 spaces, or tabs (no judgment… okay, maybe a little if you pick tabs)
Toggle uppercase keywords if you like your SELECT, FROM, and WHERE loud and proud
Click Format and watch the magic happen

Need the opposite? Hit Minify to crush your query down to a single line — perfect for config files, scripts, or anywhere you need compact SQL.

Before & After

Here’s the kind of transformation we’re talking about:

Before (the horror):

After (chef’s kiss):

Same query. Completely different vibes.

When You’ll Reach for This

Debugging production queries — Logs spit out single-line SQL. Format it, find the bug, save the day.
Documentation — Clean SQL in your docs makes future-you (and everyone else) grateful
Code reviews — Stop squinting at unformatted queries in PRs
Learning — If you’re new to SQL, formatted queries are way easier to understand
Migration scripts — Keep those long ALTER TABLE statements readable

Related Tools You Might Like

If you’re working with SQL, chances are you’re juggling other formats too. Check these out:

JSON Formatter — For when your API responses need the same love
XML Formatter — Because XML still exists (unfortunately)
CSV to JSON Converter — Moving data between formats
Text Compare — Diff two queries to spot what changed
RegEx Tester — For those times when SQL alone won’t cut it

Go Format That Query

Life’s too short for unformatted SQL. Head over to the SQL Formatter, paste your gnarliest query, and give it the structure it deserves. Your future self will thank you.

How to Convert CSV to JSON in Seconds (No Code Required)

Theo Nguyen — Mon, 23 Feb 2026 19:00:59 +0000

You know that moment when someone sends you a CSV file and you need it as JSON? Maybe it’s for an API payload, a config file, or you’re just tired of staring at comma-separated anything. You open the CSV, squint at the headers, and think: “I could write a quick script for this…” but let’s be honest, quick scripts for CSV parsing are never quick.

Enter the CSV to JSON Converter on IO Tools — paste your CSV, get your JSON, move on with your life.

Why CSV to JSON Conversion Is Everywhere

CSV is the cockroach of data formats — it’s been around forever and it’s not going anywhere. Spreadsheets export it, databases dump it, and your project manager definitely emails it. But modern apps speak JSON. APIs want JSON. Your frontend wants JSON. That gap between “here’s a spreadsheet” and “here’s structured data” is exactly where this tool lives.

Common scenarios where you’ll need this:

API development — converting sample data from spreadsheets into request/response payloads
Database seeding — turning exported CSV data into JSON for import scripts
Config generation — transforming tabular settings into structured JSON configs
Data migration — moving data between systems that speak different formats
Quick prototyping — grabbing spreadsheet data and dropping it straight into your app

How It Works (Spoiler: It’s Really Simple)

Head to the CSV to JSON Converter and either paste your CSV data or drag and drop a file. Pick your delimiter (comma, semicolon, or tab), toggle whether the first row has headers, and boom — JSON output appears instantly. No waiting, no sign-up, no “please subscribe to our newsletter first.”

The tool handles the annoying edge cases too: quoted fields with commas inside them, escaped quotes, the whole messy reality of CSV data that isn’t as clean as the spec pretends.

Features That Actually Matter

Multiple delimiters — because not everyone uses commas (looking at you, European semicolons)
Header detection — first row becomes object keys, giving you clean objects instead of arrays
Pretty print toggle — formatted for humans or minified for machines
File upload — drag and drop your files directly
Instant download — grab your converted JSON file with one click

Quick Example

Say you’ve got this CSV:

The converter turns it into:

Clean, structured, ready to use. No regex crimes committed.

Related Tools You Might Need

If you’re working with data formats, chances are you’ll want these too:

JSON to CSV Converter — the reverse trip
JSON Formatter — prettify and validate your JSON
JSON to YAML Converter — for when YAML is the destination
JSON Editor — edit and explore JSON with a tree view
JSON Minifier — compress your output for production

Stop Writing Parsers, Start Shipping

Every minute you spend writing a CSV-to-JSON conversion script is a minute you’re not spending on the thing you actually need the data for. The CSV to JSON Converter handles it in seconds — paste, convert, done.

Your CSV has places to be. Let it graduate to JSON already.

RegEx Tester: Write, Test & Debug Regular Expressions Like a Pro

Theo Nguyen — Sun, 22 Feb 2026 19:01:08 +0000

You know that feeling when you stare at a regex pattern like ^(?=.*[A-Z])(?=.*\d)[A-Za-z\d@$!%*?&]{8,}$ and your brain just… leaves the chat? Yeah, same. Regular expressions are one of those things every developer needs to know but nobody enjoys debugging in production.

That’s why we built the RegEx Tester — a free, browser-based tool that lets you write, test, and debug regex patterns in real time. No installs, no sign-ups, no existential crises.

Why You Need a RegEx Tester (Besides Sanity)

Let’s be real: writing regex without a tester is like cooking without tasting. Sure, you can do it, but the results are unpredictable and someone’s probably going to cry.

Here’s what makes a good regex tester essential:

Instant feedback — See matches highlighted as you type, not after you deploy and break everything
Capture group visibility — Actually understand what your groups are grabbing
Flag toggling — Switch between global, case-insensitive, multiline without rewriting your pattern
Error messages that help — Know why your pattern is wrong, not just that it is

What Can You Do With It?

The RegEx Tester comes loaded with features that make regex less painful:

Live Match Highlighting

Type your pattern, paste your test string, and watch matches light up in real time. No “Run” button, no waiting — it just works. This alone saves you from the classic “did it match or didn’t it?” guessing game.

Common Patterns Library

Can’t remember the pattern for email validation? (Nobody can. It’s fine.) Just pick from the built-in library of common patterns: emails, URLs, phone numbers, IP addresses, and more. Use them as-is or as a starting point for your own.

Full Flag Support

Toggle regex flags with a click:

g (global) — Find all matches, not just the first
i (case-insensitive) — Because sometimes you don’t care about case
m (multiline) — Make ^ and $ work per line
s (dotall) — Let . match newlines too
u (unicode) — For when you’re working with emoji and international text

Capture Group Details

See exactly what each numbered and named capture group matched. This is a lifesaver when you’re building complex extraction patterns and need to know which group grabbed what.

Real-World Use Cases

Not sure when you’d use regex? Here are some everyday scenarios:

Form validation — Emails, phone numbers, passwords, postal codes
Log parsing — Extract timestamps, error codes, and IPs from server logs
Data cleaning — Strip HTML tags, normalize whitespace, fix formatting
Search & replace — Find patterns in codebases (way more powerful than Ctrl+F)
Web scraping — Extract specific data from text content

Related Tools You Might Like

If you’re working with regex, chances are you’re doing other text-wrangling too. Check these out:

Email Extractor — Pull email addresses from any text (regex under the hood!)
Phone Number Extractor — Same idea, but for phone numbers
Text Compare — Diff two strings to see what changed
Case Converter — Convert text between camelCase, snake_case, and more
HTML Stripper — Remove HTML tags from text in one click

Stop Guessing, Start Matching

Regex doesn’t have to be scary. With the right tool, it’s actually kind of… fun? (Okay, maybe “satisfying” is a better word.) Head over to the RegEx Tester and take your patterns for a spin. Your future self — the one who doesn’t have to debug regex in production at 2 AM — will thank you.

How to Compress Images Without Losing Quality (And Why You Should)

Theo Nguyen — Sat, 21 Feb 2026 19:01:06 +0000

You know that feeling when you try to upload a photo and the site says “max 2MB” but your image is sitting at 8MB like it owns the place? Yeah. We’ve all been there.

Whether you’re optimizing images for a website, trying to squeeze a portfolio into an email, or just tired of your blog loading like it’s on dial-up — you need an Image Compressor. And no, you don’t need to download Photoshop for this.

Why Image Compression Matters More Than You Think

Here’s a fun fact: images account for roughly 50% of total page weight on most websites. That’s half your load time sitting in pixels. Google’s PageSpeed Insights will literally scold you for serving unoptimized images. And if you’re running an ecommerce store or a blog, slow load times mean fewer visitors, less engagement, and your bounce rate doing its best rocket impression.

But compression isn’t just about performance. It’s about being practical:

Email attachments — Most providers cap at 25MB. One uncompressed DSLR photo and you’re halfway there.
Cloud storage — Compress first, hoard later. Your future self will thank you.
Social media — Platforms compress your images anyway. Do it yourself and keep control over quality.
Web development — Faster sites rank higher. It’s that simple.

How Our Image Compressor Works

The Image Compressor on iotools.cloud keeps things refreshingly simple:

Upload your image — Drag and drop or click to browse. Supports JPG, PNG, and WebP.
Adjust the quality slider — Slide from 1 to 100. Lower = smaller file, higher = better quality. Find your sweet spot.
Pick an output format — Want to convert a PNG to WebP while compressing? Go for it.
Download — Grab your freshly compressed image. Done.

The best part? Everything happens in your browser. Your images never get uploaded to any server. Zero privacy concerns, instant processing, works offline once loaded. It’s compression without the trust issues.

JPG vs PNG vs WebP — Which Format Should You Use?

Quick cheat sheet:

JPG — Best for photos and complex images with lots of colors. Lossy compression, but at 80% quality most people can’t tell the difference.
PNG — Best for graphics, logos, and images with transparency. Larger file sizes but lossless.
WebP — The overachiever. Smaller than both JPG and PNG at similar quality. Supported by all modern browsers. If you’re not using WebP for your website in 2026, what are you doing?

Pro tip: use the Image Compressor’s format conversion to switch from PNG to WebP. You’ll often see 50-70% size reduction with virtually no visible quality loss. That’s free performance.

Real-World Use Cases

Web developers: Run your hero images through the compressor before deployment. Pair it with our Image Converter for batch format changes, or use the Crop Image tool to get dimensions right before compressing.

Designers: Sending mockups to clients? Compress those PNGs so their inbox doesn’t cry. Need to convert SVG assets? Check out our SVG to Base64 encoder for inline embedding.

Content creators: Blog images, social media posts, newsletter graphics — compress everything. Your readers on mobile will appreciate the faster loads. Generate engaging text for your posts with the AI Writer while you’re at it.

Everyone else: That vacation folder with 2,000 photos taking up 15GB? Twenty minutes with the compressor and you’ve got your storage back.

The Quality Sweet Spot

Not sure what quality level to pick? Here’s a rough guide:

90-100% — Barely any compression. Use when quality is critical (print, portfolio).
70-85% — The sweet spot for web images. Significant size reduction, minimal visible difference.
50-65% — Noticeable quality drop on close inspection, but fine for thumbnails and previews.
Below 50% — You’re in “placeholder image” territory. Proceed with caution.

For most web use, 80% quality in WebP format is the chef’s kiss. Maximum savings, minimum compromise.

Related Tools You Might Like

Image Converter — Convert between image formats without compression
Crop Image — Resize and crop before compressing
Compare Images — Side-by-side comparison to check compression results
Round Corners — Add rounded corners to your images
Encode File to Base64 — Embed compressed images directly in code

Stop Serving Bloated Images

Look, there’s no excuse for serving 5MB hero images in 2026. The Image Compressor is free, fast, private, and works right in your browser. Go compress something. Your users (and your Lighthouse score) will thank you.

The Color Picker You’ll Actually Bookmark

Theo Nguyen — Fri, 20 Feb 2026 19:01:05 +0000

You know that moment when you see the perfect color on a website and think “I need that exact shade”? Then you spend 15 minutes squinting at hex codes, converting between RGB and HSL, and questioning your life choices? Yeah, we built a tool for that.

The Color Picker on iotools.cloud lets you grab any color visually and instantly get it in HEX, RGB, and HSL — no math degree required.

Why You Need a Color Picker (Even If You Think You Don’t)

Whether you’re a developer trying to match your client’s brand colors, a designer tweaking gradients, or just someone who really cares about their terminal theme — color conversion is one of those things you do way more often than you’d expect.

And let’s be honest: manually converting #FF6B35 to rgb(255, 107, 53) to hsl(19, 100%, 60%) in your head is not a productive use of your brain cells.

What Makes This Color Picker Actually Good

There are roughly ten million color pickers on the internet. Here’s why ours doesn’t suck:

Visual color wheel — Click around until something feels right. No judgment.
HEX + RGB + HSL all at once — Pick a color, get all three formats instantly. No tab-switching.
Bidirectional editing — Type in any format and watch the others update in real-time. It’s weirdly satisfying.
One-click copy — Hit the copy button, paste into your CSS. Done in two seconds.
Random color generator — Feeling uninspired? Let chaos decide your next accent color.
Live preview swatch — See exactly what you’re getting before you commit.

Real-World Use Cases

CSS Development: You’re building a dark mode toggle and need to convert your brand’s hex colors to HSL so you can easily adjust lightness values. Pop them into the Color Picker, grab the HSL output, and tweak away. While you’re at it, our CSS Gradient Generator can help you build smooth transitions between those colors.

Design Systems: Your Figma file uses RGB, your codebase uses hex, and the accessibility checker wants HSL. Instead of three different converters, use one tool that speaks all the formats. Need to check hex values specifically? The Hex to RGBA Converter has your back for alpha channel work.

Quick Exploration: Smash that random color button a few times, find something unexpected, and build a whole palette around it. Some of the best design decisions come from happy accidents.

Pro Tips

Start with HSL if you’re building color schemes — it’s the most intuitive format for adjusting brightness and saturation
Use the random button when you’re stuck in a color rut (we’ve all been there)
Bookmark it — you’ll use it more than you think

Related Tools

If you’re working with colors, you might also find these handy:

Hex to RGBA Converter — When you need alpha channel support
RGBA to Hex Converter — Go the other direction
CSS Gradient Generator — Build beautiful gradients visually
Random Color Generator — Generate palettes and random colors
Image Converter — Working with images? Convert between formats

Go Pick Some Colors

Stop eyeballing hex codes and hoping for the best. The Color Picker is free, fast, and runs right in your browser — no installs, no sign-ups, no nonsense.

Your CSS will thank you.

How to Add Rounded Corners to Any Image (In 3 Seconds)

Theo Nguyen — Thu, 19 Feb 2026 19:00:56 +0000

You know that subtle thing Apple does where every icon, every card, every UI element has those perfectly smooth rounded corners? There’s a reason it looks so good — sharp 90-degree edges feel aggressive. Rounded corners feel friendly. And now you can add them to any image in about 3 seconds.

The Round Corners tool on iotools.cloud lets you soften up any image with adjustable corner radius, individual corner control, and clean transparent PNG output. No Photoshop required. No account needed. Just upload, slide, download.

Why Rounded Corners Matter More Than You Think

Rounded corners aren’t just an aesthetic flex. Research actually shows our eyes process rounded shapes faster than sharp ones. They guide the eye inward toward the content instead of outward toward the edges. That’s why every modern design system — Material Design, Apple HIG, you name it — leans heavily on border-radius.

Whether you’re polishing a profile picture, designing app icons, creating thumbnails, or just making a screenshot look less like a raw screen grab, rounded corners add that instant “someone actually designed this” vibe.

How It Works

The tool is dead simple:

Upload your image — drag and drop or click to browse
Adjust the radius — use the slider to control how rounded you want things (pixels or percentage)
Pick your corners — want only the top corners rounded? Just the bottom-left? Go wild, each corner is independently adjustable
Download as PNG — transparent background, ready to drop into any design

The transparent PNG output is clutch. It means you can layer the rounded image on top of any background — colored cards, gradient headers, presentation slides — and it just works.

5 Things You Can Round-Corner Right Now

1. Profile Pictures — Most platforms crop to circles, but rounded squares (like Discord avatars or Slack thumbnails) hit different. Stand out with a clean rounded-square profile pic.

2. App Icons — Designing a PWA or side project? iOS-style rounded icons are the standard. Get the look without opening Figma.

3. Screenshots — Raw screenshots in blog posts or docs look lazy. A subtle 12-20px border radius makes them look polished instantly.

4. Social Media Graphics — Rounded images in carousels and posts feel more premium. It’s the little details that make people stop scrolling.

5. Thumbnails — YouTube thumbnails, blog featured images, product cards. Rounded corners = instant polish. While you’re at it, grab your YouTube thumbnails with our YouTube Thumbnail Downloader.

Pro Tips

Use percentage mode for consistent results across different image sizes — 50% gives you a perfect circle/pill shape
Asymmetric corners can create cool design effects — round only the top corners for card-style headers
Pair with the Crop Image tool to get the perfect aspect ratio before rounding
Need to convert your image format first? We’ve got that too

Related Tools You’ll Love

Crop Image — Resize and crop before rounding
Image Converter — Convert between PNG, JPG, WebP and more
Compare Images — See before/after side by side
Image to Text Converter — Extract text from images with OCR
CSS Gradient Generator — Create beautiful gradient backgrounds for your rounded images

Sharp corners are so 2005. Go round your images at iotools.cloud/tool/round-corners and join the smooth side.

How to Crop Images Online in Seconds (No Software Needed)

Theo Nguyen — Wed, 18 Feb 2026 19:00:57 +0000

You know that feeling when you take a near-perfect photo, but there’s a random stranger’s elbow in the corner? Or when your profile pic would be chef’s kiss if it weren’t for that pile of laundry in the background? Yeah, we’ve all been there.

Enter the Crop Image tool — your browser-based scissors for cutting images down to exactly what matters. No downloads, no sign-ups, no Photoshop subscription that costs more than your Netflix.

Why Cropping Matters More Than You Think

Cropping isn’t just about removing unwanted bits (though that’s a big part of it). It’s about composition. Professional photographers spend years learning the rule of thirds, and here you are — one drag-and-drop away from nailing it. Some reasons you might need to crop:

Social media sizing — Instagram squares, Twitter banners, LinkedIn headers all want different dimensions
Removing distractions — goodbye, photobombing seagull
Focusing on your subject — zoom in on what actually matters
Matching aspect ratios — for presentations, websites, or print

How the Crop Image Tool Works

It’s dead simple (the best tools always are):

Upload your image — drag and drop or click to browse
Select your crop area — either drag visually on the image or punch in exact pixel coordinates (X, Y, Width, Height) if you’re feeling precise
Lock the aspect ratio — need a perfect square? A 16:9 widescreen? Toggle the lock and drag freely
Hit Crop — download your freshly trimmed image as a PNG

That’s it. No 47-step wizard. No “please create an account first.” Just crop and go.

When Exact Coordinates Save Your Life

The visual drag-to-crop is great for casual use, but sometimes you need pixel-perfect precision. Maybe you’re:

Preparing images for a design system where every asset must be exactly 400×300
Cropping multiple images to the same area for a before/after comparison
Extracting a specific UI element from a screenshot for documentation

That’s where the coordinate input shines. Type in your exact X, Y, Width, and Height values and get a mathematically perfect crop every time. Your inner perfectionist will thank you.

Pair It With Other Tools

Cropping is often just one step in your image workflow. Here are some tools that play nicely with Crop Image:

Image Converter — need your cropped image in JPEG, WebP, or another format? Convert it instantly
Compare Images — put your original and cropped versions side by side
Encode File to Base64 — embed your cropped image directly in HTML or CSS
Image to Text Converter — crop to just the text area, then extract it with OCR
QR Code Generator — generate a QR code, then crop it to the perfect size for print

Go Crop Something

Stop overthinking it. That image sitting in your downloads folder with the weird framing? Go fix it. The Crop Image tool is free, runs entirely in your browser, and takes about 5 seconds.

Your photos deserve better edges.

How to Extract Email Addresses From Any Text in Seconds

Theo Nguyen — Tue, 17 Feb 2026 19:00:56 +0000

You know that feeling when someone sends you a massive wall of text — a report, a webpage dump, a 47-page PDF copied into an email — and somewhere in there are the 12 email addresses you actually need? You could scroll through it manually like some kind of medieval scribe, or you could let a tool do it in literally one second.

Meet the Email Extractor — your new best friend for pulling email addresses out of any text, no matter how messy.

What Does It Do?

Paste in any text. Get back a clean, deduplicated, alphabetically sorted list of every email address hiding in there. That’s it. No sign-ups, no limits, no “premium tier to unlock sorting.” Just paste, extract, done.

It’s like Ctrl+F on steroids, except it actually understands what an email address looks like (which is more than most humans can say — looking at you, person who types “john at gmail dot com”).

When Would You Actually Use This?

More often than you’d think:

Cleaning up contact lists — Got a spreadsheet export that’s more formatting than data? Paste the whole mess in and pull out just the emails.
Scraping your own inbox — Copy a long email thread and extract every participant’s address in seconds.
Processing documents — Legal docs, contracts, reports — they’re full of buried contact info.
Web research — Copied a webpage’s source or content? Extract all the contact emails without reading through the noise.
Event management — Pull attendee emails from registration confirmations or sign-up forms.

The Details That Matter

A few things make this tool actually good rather than just “technically functional”:

Automatic deduplication — If the same email appears 47 times in your text, you get it once. Revolutionary, I know.
Alphabetical sorting — Results come back sorted so you can actually find what you’re looking for.
Copy or download — Grab the list to your clipboard or download it as a file. Your call.
No data storage — Everything happens in your browser. Your text doesn’t go anywhere.

Pair It With Other Tools

The Email Extractor plays nicely with other tools in the IO Tools lineup:

Need to extract phone numbers too? Try the Phone Number Extractor.
Got duplicate lines in your extracted data? Clean them up with the Duplicate Lines Remover.
Want to sort your results differently? The Sort List tool has you covered.
Need to count how many emails you found? Line Counter does exactly that.
Working with messy text? Clean it up first with the Whitespace Trimmer.

Go Extract Some Emails

Stop squinting at walls of text trying to spot email addresses like it’s a Where’s Waldo book. The Email Extractor does in one click what would take you ten minutes of painful scrolling. Your eyes will thank you.