About DevToolHub — Free Online Developer Tools

DevToolHub is a free collection of online developer tools built with a single principle: your data stays on your device.

Our Mission

Developers use dozens of small utilities every day — formatting JSON, encoding Base64, generating UUIDs, testing regex patterns, decoding JWTs. Most online tools that offer these features send your data to a server for processing. That means your API keys, tokens, production data, and proprietary code pass through someone else's infrastructure.

We built DevToolHub to solve this. Every tool on this site runs entirely in your browser using client-side JavaScript. No data is ever uploaded, logged, or stored on any server. You can verify this yourself by checking the Network tab in your browser's DevTools — there are zero outgoing requests when you use any tool.

How It Works

DevToolHub is built with Astro, a modern static site generator that produces fast, lightweight HTML pages. Interactive tool components are built with React and loaded as isolated "islands" — only the tool widget itself requires JavaScript, while the rest of the page is pure static HTML.

This architecture means pages load instantly, Core Web Vitals scores are excellent, and the site works reliably even on slow connections. There is no backend server, no database, and no API — just static files served from a CDN.

What We Offer

Currently, DevToolHub provides 43 developer tools across categories including JSON processing, encoding/decoding, code formatting, data generation, text utilities, date/time conversion, hashing, regex testing, and color conversion. We also maintain a developer blog with 17 in-depth guides and tutorials.

We are continuously adding new tools and articles. If you have a suggestion for a tool you'd like to see, we'd love to hear from you.

The Team

DevToolHub is maintained by the DevToolHub Team — a small group of developers who believe that essential developer utilities should be free, fast, and private. We use these tools ourselves every day, and we build them to the standard we'd want as users.