Developer Tools
Essential utilities for developers — formatters, encoders, generators and more. Free, fast, 100% private in-browser utilities.
19 tools available in this category
A complete collection of developer utilities for formatting, encoding, hashing, testing, and decoding data structures. Every developer tool runs 100% locally inside your web browser sandbox using modern client JavaScript and Web Crypto APIs.
JSON Formatter
Format, minify, and validate JSON in one click
Base64 Encoder / Decoder
Encode or decode Base64 strings instantly
URL Encoder / Decoder
Percent-encode or decode URL components
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text
Regex Tester
Test regular expressions with live highlighting
Color Picker & Converter
Pick and convert colors between HEX, RGB, HSL
Password Generator
Generate secure random passwords with customizable rules
Lorem Ipsum Generator
Generate placeholder text for designs and mockups
QR Code Generator
Create QR codes for any URL or text instantly
Time Zone Converter
Convert times between any time zones with live multi-zone comparison and Nepal (UTC+5:45) support
Markdown Preview
Write Markdown and preview the rendered HTML in real time
Link Shortener
Shorten long URLs with clean custom aliases
UUID Generator
Generate v4 UUIDs individually or in bulk, with copy and export
JWT Decoder
Decode JWT tokens to inspect header and payload, with optional HMAC signature verification
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, in any timezone
CSS & JS Minifier
Minify CSS or JavaScript by removing whitespace, comments, and shortening code
HMAC Generator
Generate cryptographic HMAC signatures using SHA-256, SHA-512, MD5, or SHA-1 with custom secret keys
Random Token Generator
Generate cryptographically secure API keys, secret tokens, hex strings, and bulk random keys
File Checksum Verifier
Verify file integrity locally by calculating SHA-256, SHA-512, SHA-1, and MD5 hashes without uploading files