Developer Tools
Runs locallyA free toolkit for everyday development: format JSON, convert Base64, test regex, decode JWTs and more — all running locally in your browser.
JSON Formatter & Validator
Format, validate, beautify or minify JSON instantly — right in your browser.
Base64 Encoder / Decoder
Convert text to Base64 and back, with full Unicode support — all in your browser.
URL Encoder / Decoder
Encode and decode URLs and URI components safely — instantly, in your browser.
UUID Generator
Generate random v4 UUIDs in bulk — cryptographically random, right in your browser.
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back — with live current time.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities and decode them back — safe for pasting code into pages.
Color Converter
Convert colors between HEX, RGB and HSL — with a visual picker and one-click copy.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36.
Regex Tester
Test regular expressions with live highlighting, match groups, replacement and a pattern cheat sheet.
JWT Decoder
Decode JSON Web Tokens locally: inspect the header, payload claims and expiry — the token never leaves your browser.
Every developer keeps a handful of these utilities open in pinned tabs. This collection covers the daily grind — formatting and validating JSON, encoding Base64 and URLs, generating UUIDs, converting timestamps and number bases, testing regular expressions and decoding JWTs. Paste your data and get instant results; because everything runs in your browser, even production secrets and sensitive payloads never leave your machine.