Every dev tool you need, in one place

Format and convert JSON, XML and YAML, encode Base64, decode JWTs, generate hashes and encode URLs — 100% free and private. Every tool runs right in your browser, so your data never leaves your device.

⚡ Instant, no waiting 🔒 Private — runs in your browser 💯 Free to use

Choose a tool to get started

Pick one of our developer tools below. No sign-up required.

JSON Formatter Beautify, minify and validate JSON with sorted keys and custom indentation. XML Formatter Pretty-print, minify and validate XML right in your browser. YAML ⇄ JSON Convert YAML to JSON and JSON to YAML in one click. Base64 Encode / Decode Encode or decode Base64 text, or turn a file into a Base64 string. JWT Decoder Inspect a JSON Web Token's header, payload and expiry — no signature sent anywhere. Hash Generator Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text. URL Encode / Decode Percent-encode or decode URLs and query-string components.

Why use Dev Tools

🔒Private by designFormatting, conversion and hashing all happen in your browser. Your data is never uploaded.

⚡Fast and freeNo queues, no sign-up, no software to install. Just open a tool and use it.

📱Works everywhereUse it on your computer, tablet or phone. Add it to your home screen and work offline.

Frequently Asked Questions

Are these developer tools really free?

Yes. All tools are free to use. Premium removes free-tier limits like input size and daily usage.

Is my data safe?

Every tool processes your text entirely in your browser — nothing is ever sent to a server, which is the most private way to handle code and secrets.

Do I need to create an account?

No account is needed to use the tools. You only sign up if you choose to go Premium.

Is it safe to paste a JWT or secret here?

Yes. The JWT decoder and every other tool run locally in your browser. Tokens and text are never transmitted or stored.

Is there a size or usage limit?

Free use has a generous input-size limit and a daily task count. Premium removes both for unlimited use.

Can I use it on mobile?

Yes. Dev Tools works on any modern browser and can be installed as an app on your phone.