About DevToolsHub

DevToolsHub is a collection of 98 free developer utilities across 13 categories — JSON, encoding, security, time, regex, network, text, and more. It exists because the small tasks between the big ones eat entire afternoons: formatting a minified API response, decoding a JWT to check its expiry, building a cron expression you can actually trust. Each of our tools does one of those jobs well, loads fast, and works without an account.

What we believe a tool site should be

  • Private by default. Nearly every tool runs entirely in your browser — the data you paste never reaches our servers. The few tools that need a server (like DNS lookup) say so explicitly. Details on the How it works page.
  • Honest about behavior. Every tool page documents how it works, its edge cases, and the errors you might hit — including the standards it follows (RFC 8259 for JSON, RFC 4648 for Base64, RFC 7519 for JWTs, and so on).
  • Fast and unobtrusive. No signup walls, no upload spinners. Large inputs run in background workers so the page never freezes.
  • Free. The site is ad-supported; the tools themselves are free for any use, personal or commercial.

How the site is built

DevToolsHub is built with Next.js and TypeScript, rendered as static pages for speed, with all tool logic running client-side in JavaScript and Web Workers. Cryptographic operations (hashing, HMAC, random generation) use the browser's native Web Crypto API rather than custom implementations. We track anonymous, aggregate usage (which tools are popular) to decide what to improve next — never the content you paste into a tool.

Keep us honest

Found a bug, a wrong answer, or an edge case we got wrong? We treat correctness reports as the highest-priority feedback there is. Reach us via the contact page — and see what has changed recently on the changelog.