Stop Pasting Production Tokens into Random Websites. Here’s a Safer Alternative.

정용훈 — Fri, 16 Jan 2026 04:12:34 +0000

We've all done it. You need to debug a JWT or format a massive JSON log, so you Google "JWT decoder" and click the first result.

But have you checked the Network tab? Many of these tools send your data to their servers. For simple things, maybe it's fine. For production API keys or user data? It's a security risk.

That's why I built Dev Utility Hub.

Check it out: https://tools.hun-ing.com

Why I built this
I wanted a toolkit that I could trust. My strict rule for this project was: "Zero Backend Processing."

Everything—hashing, formatting, converting—happens right in your browser using JavaScript.

Top Tools Included

JSON Formatter & Validator: Handle large files without crashing.

JWT Decoder: Debug tokens safely. The secret key part is never verified server-side, so it's purely for inspection.

Cron Expression Parser: Because nobody remembers cron syntax perfectly.

Unix Timestamp Converter: A lifesaver for debugging backend logs. It's built with Next.js and Tailwind, designed to be clean, fast, and dark-mode friendly.

Give it a try and let me know what you think!

Forem: 정용훈

Stop Pasting Production Tokens into Random Websites. Here’s a Safer Alternative.