Free Online Developer Tools
Essential utilities for developers. Format JSON, encode Base64, and decode URLs securely in your browser.
JSON Formatter & Validator
Format, validate, prettify and beautify your JSON data instantly.
Base64 Encoder & Decoder
Encode to Base64 or decode from Base64 instantly in your browser.
URL Encoder & Decoder
Encode or decode URL-encoded strings safely and securely.
Hash Generator (MD5, SHA-256)
Generate cryptographic secure hashes including MD5, SHA-1, SHA-256, and SHA-512 instantly.
Secure Password Generator
Generate strong, secure, and random passwords locally in your browser.
UUID / GUID Generator
Generate valid universally unique identifiers (UUIDs/GUIDs) instantly.
JWT Decoder
Decode JSON Web Tokens (JWT) safely to view header and payload without sending secrets to any server.
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates, and vice versa.
SQL Formatter & Beautifier
Format, beautify, and strictly align your messy SQL queries securely.
HTML Formatter & Beautifier
Format and beautify your messy HTML code instantly in your browser.
CSS Formatter & Beautifier
Format, standardize, and beautify your CSS styling rules securely.
JavaScript Formatter
Beautify and format minified or messy JavaScript code using standard conventions.
XML Formatter & Beautifier
Easily format and indent unformatted or minified XML files.
RegEx Tester
Test, visualize, and debug Regular Expressions instantly in your browser.
Cron Expression Generator
Parse, generate, and visualize Cron schedule expressions with next run times.
QR Code Generator
Generate high-quality SVG and PNG QR Codes instantly in your browser.
Color Converter (HEX/RGB/HSL)
Convert colors between HEX, RGB, HSL, and CMYK formats interactively.