JSON Formatter & Validator
Beautify, minify and validate JSON with exact error line and column reporting.
6 tools
Developer Tools
Format JSON, encode Base64, escape URLs, minify assets and generate QR codes — the small utilities that sit between you and shipping, all running client-side.
Base64 Encoder & Decoder
Encode or decode Base64 text and files with correct UTF-8 and URL-safe handling.
URL Encoder & Decoder
Percent-encode or decode URLs and inspect every query parameter in a table.
HTML, CSS & JS Minifier
Strip comments and whitespace from HTML, CSS or JavaScript and see the saving.
QR Code Generator
Build scannable QR codes for links, Wi-Fi, text and contacts — PNG or SVG.
URL Shortener
Create compact self-contained short links that resolve without any server.
About these tools
A developer's day is punctuated by twenty-second detours: an API returns a wall of unformatted JSON, a config file needs a Base64 blob, a query string has to be escaped correctly, or a stylesheet needs shrinking before it goes live. Each detour is trivial, and each one still breaks concentration if the tool you reach for is slow, ad-choked or asks you to sign in.
These developer tools are built to disappear. They load fast, they remember nothing, and they never transmit what you paste. That last point matters more than it sounds: production payloads routinely contain access tokens, customer email addresses and internal identifiers, and pasting those into an unknown server-side formatter is a data-handling incident waiting for a name.
Why use the tools here
- Safe with real payloadsNothing is transmitted, so you can paste a response body containing tokens or customer data without creating a leak.
- Precise error reportingThe JSON validator reports the line, column and character where parsing failed instead of a generic 'invalid JSON'.
- Copy or downloadEvery result can be copied in one click or saved as a properly named file.
- Standards-correctUTF-8 aware Base64, correct encodeURIComponent semantics and QR codes that follow the ISO/IEC 18004 specification.