I Built 24 Free Developer Tools - No Signup, No Ads, No BS

Jalel Ghabri — Tue, 16 Dec 2025 00:46:18 +0000

Hey devs! 👋

I got tired of:

Tools that require signup just to format JSON
Sites plastered with ads that make the page unusable
"Free" tools that limit you to 3 uses per day
Sending my code/data to random servers

So I built Dev Tools - a collection of 24 essential developer utilities that are:

✅ 100% Free - No premium tiers, no limits

✅ No Signup Required - Just use it

✅ Privacy-First - Everything runs in your browser, no data stored

✅ Fast & Clean - Minimal UI, maximum utility

What's Included?

Data Conversion & Formatting

CSV Converter - CSV → JSON, SQL INSERT, PHP arrays
YAML/JSON Converter - Bidirectional conversion
JSON Parser - Format, minify, validate, and even repair broken JSON
SQL Formatter - Beautify or compress SQL queries

Encoding & Security

Base64 Encoder - Encode/decode text and files
Hash Generator - MD5, SHA-1, SHA-256, SHA-512
URL Encoder - Encode/decode + parse URL components
JWT Decoder - Inspect JSON Web Tokens
Password Generator - Secure random passwords

Developer Utilities

Regex Tester - Live matching with explanation
Cron Parser - Human-readable cron explanations
Timestamp Converter - Unix ↔ Human dates
UUID Generator - Generate, validate, format UUIDs (v4)
Diff Checker - Compare texts, highlight differences

Text & Content Tools

Markdown Preview - Live preview with HTML export
Code Editor - HTML/CSS/JS with live preview
Text Case Converter - camelCase, snake_case, UPPER, etc.
Slug Generator - URL-friendly slugs
Lorem Ipsum Generator - Placeholder text
Sort Lines - Sort, dedupe, reverse, shuffle

Visual Tools

Color Picker - HEX, RGB, HSL, CMYK conversion
QR Code Generator - URLs, text, and more
Base Converter - Binary, octal, decimal, hex
HTML Entity Encoder - Encode/decode special characters

Why I Built This

As a backend developer with 12+ years of experience, I use these tools daily. I wanted something that:

Just works - No friction, no distractions
Respects privacy - Client-side processing only
Loads fast - No bloated frameworks
Stays free - Forever

Tech Stack

Vanilla HTML/CSS/JS (keeping it simple)
No external API calls for processing
Mobile responsive
Dark mode friendly

Open Source

The project is open source on GitHub. Feel free to:

⭐ Star if you find it useful
🐛 Report bugs or request features
🤝 Contribute new tools

What's Next?

I'm planning to add:

Image optimization tools
API request builder
JSON Schema validator
Code minifiers (HTML, CSS, JS)

What tools would YOU want to see? Drop a comment below! 👇

🔗 Try it: dev-tools.online

Forem: Jalel Ghabri