Developer Tools
69 free tools
Format JSON, decode JWT, generate UUIDs & hashes, test regex, convert bases -- your client-side dev swiss knife.
A complete client-side toolkit for developers: format and beautify JSON, CSS, SQL and YAML, decode JWT tokens, generate UUIDs and cryptographic hashes, test regular expressions, convert between data formats, and validate inputs. Every operation runs in your browser with zero uploads, so your code, tokens and data never leave your device. Built for speed - no sign-up, no rate limits, works offline as a PWA.
Code Formatters & Beautifiers
Format, beautify and minify JSON, CSS, JS, SQL, YAML, XML and more.
Code Converters
Convert between JSON, CSV, YAML, TOML, TypeScript and other formats.
Encoders & Decoders
Base64, URL, HTML entities, JWT, binary, X.509 and string escape.
Code Generators
Generate UUIDs, hashes, SSH keys, .gitignore, README, Dockerfile and more.
Validators & Network
Regex tester, JSON schema, HTTP status, IP subnet, email, credit card validators.
Security Tools
Password generator, passphrase, encryption, PIN generator, file checksum and secure notes.
Why Use Our Client-Side Developer Tools?
Every tool in this collection runs entirely in your browser using JavaScript and Web APIs. Nothing is uploaded to any server, which means your source code, API keys, JWT tokens, and sensitive data never leave your device.
Unlike server-based alternatives, our developer tools work offline once loaded. Format JSON on a plane, decode JWTs on a train, or generate UUIDs without an internet connection. The only thing you need is a modern browser.
Speed is a core advantage. There is no server round-trip, no upload queue, and no processing delay. Results appear instantly as you type, making these tools ideal for rapid prototyping and debugging sessions.
