Programmer
Everyday utilities for software developers: generate UUIDs and hashes, decode JWTs, format JSON, test regular expressions, and convert timestamps and colors — all running locally in your browser.
Math
Bitwise Calculator - AND, OR, XOR, NOT, Shift Operations
Free bitwise calculator for AND, OR, XOR, NOT, left shift, and right shift. Supports decimal, binary, and hex input with instant multi-format results.
Bit Shift Calculator - Binary Left & Right Shift Operations
Perform left shift, logical right shift, and arithmetic right shift on integers. Results shown in binary, decimal, and hexadecimal with instant calculations.
Developer Tools
True Random UUID Generator - Bulk v4 & v7 UUIDs Online
Generate UUIDs with true randomness: atmospheric-noise seeding from RANDOM.ORG or local CSPRNG. Version 4 and time-ordered v7, single or bulk up to 1,000.
JSON Formatter & Validator - Beautify, Minify & Check JSON
Format, validate, and minify JSON online with clear error messages and adjustable indentation. Paste raw JSON and get clean output — private, in-browser.
Base64 Encoder & Decoder - Convert Text and Files Online
Encode text or files to Base64 and decode Base64 back to text in your browser. Supports UTF-8, URL-safe Base64, and data URIs — fast, free, and private.
JWT Decoder - Decode & Verify JSON Web Tokens Online
Decode JWT header and payload instantly and verify HS256 signatures in your browser. Tokens never leave your device — a fast, private JWT inspector.
Hash Generator - MD5, SHA-1, SHA-256 & SHA-512 Online
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes of any text right in your browser. Compare checksums and verify integrity — nothing is sent to a server.
URL Encoder & Decoder - Encode URLs and Query Strings
Percent-encode or decode URLs, query strings, and form data online. Handles UTF-8 and reserved characters correctly — a fast, private, in-browser tool.
Regex Tester - Test Regular Expressions with Live Matches
Test JavaScript regular expressions against sample text with live match highlighting, flags, and capture groups. Debug patterns fast — free and private.
Unix Timestamp Converter - Epoch Time to Date & Back
Convert Unix timestamps to human-readable dates and dates back to epoch seconds or milliseconds. See UTC and local time side by side — fast and free.
Cron Expression Parser - Explain Cron Schedules in English
Paste a cron expression and get a plain-English explanation plus the next scheduled run times. Supports standard 5-field crontab syntax — free and instant.
Color Converter - HEX, RGB, HSL & OKLCH Color Codes
Convert colors between HEX, RGB, HSL, and OKLCH with a live preview and copy-ready CSS values. Pick a color or paste a code — free, fast, in-browser.
Case Converter - camelCase, snake_case, Title Case & More
Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and more. Paste once, copy any style — free and instant.
Text Diff Checker - Compare Two Texts and Highlight Changes
Compare two blocks of text and see additions and deletions highlighted line by line or word by word. Great for code, documents, and contracts — private.
True Random Password Generator - Strong Secure Passwords
Create strong passwords with true randomness: RANDOM.ORG atmospheric-noise seeding or local CSPRNG, custom length and symbols — nothing leaves your browser.
QR Code Generator - Create Free QR Codes for URLs & Text
Create QR codes for URLs, text, Wi-Fi, and contact info with adjustable size and error correction. Download as PNG — generated locally in your browser.