About DevToolBox

DevToolBox is a collection of free, high-quality developer tools that run entirely in your browser. No data is ever sent to our servers — every tool processes your input locally, on your device.

Why We Built This

As developers, we constantly need quick tools: formatting JSON, generating UUIDs, checking text diffs, encoding Base64. Most tools online either require sign-ups, have ugly ads that block your workflow, or send your data to their servers. We built DevToolBox to be the opposite of that.

Our Principles

• Client-Side Processing — All tools run in your browser using JavaScript and the Web Crypto API. Your data never leaves your device.
• No Sign-Up Required — Every tool is free and accessible immediately. No accounts, no registration, no subscription.
• Privacy First — We don't track you, collect your data, or store your input. What you type stays on your machine.
• Clean, Fast Interface — No clutter, no popups, no distractions. Just the tool you need, ready to use.
• Mobile Friendly — All tools work on desktop, tablet, and mobile devices.

Available Tools

We currently offer tools for JSON formatting, text diff comparison, UUID generation, Base64 encoding, URL encoding, regex testing, JWT decoding, Markdown preview, color conversion, SQL formatting, Lorem Ipsum generation, and SHA/MD5 hash generation. We're constantly adding more.

Contact

Have a suggestion for a new tool? Found a bug? We'd love to hear from you. Visit our Contact page.