Developer Tools That Just Work
24+ free, fast, offline-capable tools for everyday development tasks. No signup, no ads, no tracking.
100% Client-Side & Secure
All tools run entirely in your browser. Your data is never sent to any server, never logged, never stored. Close the tab and it's gone. Perfect for sensitive data like API keys, tokens, and private keys.
JSON Formatter
Format, validate, and beautify JSON with syntax highlighting
FormatterHTML Beautifier
Format and indent HTML code for readability
FormatterCSS/JS Minifier
Minify CSS and JavaScript to reduce file size
FormatterSQL Formatter
Format and beautify SQL queries for any dialect
FormatterMarkdown Preview
Live Markdown editor with instant preview and export
EditorBase64 Encoder
Encode and decode Base64 strings and files
EncoderBase58 Converter
Convert Base58 ↔ Hex ↔ Bytes (Solana/Bitcoin)
EncoderHex Converter
Convert between hex, text, binary, and decimal
EncoderBinary Converter
Convert between binary, text, hex, and decimal
EncoderURL Encoder
Encode and decode URL parameters safely
EncoderYAML ↔ JSON
Convert between JSON and YAML formats instantly
ConverterColor Converter
Convert colors between HEX, RGB, and HSL
ConverterTimestamp Converter
Convert Unix timestamps to human dates
ConverterString Escape
Escape/unescape JS, HTML, JSON strings
EncoderJSON ↔ CSV
Convert JSON arrays to CSV and vice versa
ConverterNumber Base
Convert between binary, octal, decimal, hex (base 2-36)
ConverterEpoch Converter
Live Unix timestamp with epoch/date conversion
ConverterHash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
CryptoBcrypt Generator
Generate and verify bcrypt password hashes
CryptoJWT Decoder
Decode and inspect JSON Web Tokens
CryptoChecksum Calculator
Calculate CRC32 and Adler32 checksums
CryptoPrivate Key Tools
Convert keys between Solana/Ethereum formats
CryptoPassword Generator
Generate secure random passwords with customizable options
🔒 SecureUUID Generator
Generate unique UUIDs v4 in bulk
GeneratorQR Code Generator
Create QR codes from text/URLs, download PNG/SVG
GeneratorLorem Ipsum
Generate placeholder text for mockups
GeneratorCron Generator
Build and validate cron expressions visually
GeneratorRegex Tester
Test and debug regular expressions with live matching
TesterDiff Checker
Compare two texts and highlight differences
TesterIP Address Tools
CIDR calculator, subnet mask, IPv4 binary converter
NetworkASCII Table
Full ASCII reference with search and text converter
Reference