Developer Tools
Collection of free and powerful online developer tools for everyone to use.
Base64 Encoder / Decoder
Encode or decode Base64 with URL-safe and MIME wrap options.
JSON Formatter
Format, validate, and minify JSON. Beautify JSON with customizable indentation or compress it to a single line.
JSON Validator
Validate JSON syntax instantly. Check if your JSON is valid, find errors with precise location information, and get detailed feedback. Perfect for debugging API responses and configuration files.
Regex Tester & Explainer
Test and debug regular expressions with live match highlighting, flag testing, and detailed explanations. Perfect for learning regex and debugging patterns.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Perfect for checksums, data integrity verification, and cryptographic operations.
Password Hash Generator
Generate secure password hashes using Argon2id, bcrypt, scrypt, and PBKDF2. Configure memory cost, iterations, and other parameters for optimal security.
Timestamp Converter
Convert Unix timestamps (seconds or milliseconds) to human-readable dates and vice versa. Supports multiple timezones, ISO 8601, RFC 2822, and more formats.
Cron Expression Parser
Parse cron expressions into human-readable descriptions and visualize next run times in a calendar. Perfect for cron expression troubleshooting and understanding.
JWT Decoder
Decode JSON Web Tokens (JWTs) into their component parts: header, payload, and signature. Perfect for debugging authentication tokens and verifying token contents.
User Agent Parser
Parse user agent strings into their component parts: browser, operating system, device type, and more. Perfect for debugging user agent strings and verifying user agent contents.
Markdown to HTML Converter
Convert Markdown to HTML. Perfect for converting Markdown to HTML for use in websites, blogs, and other content.
CRC32 Calculator
Generate quick CRC32 checksums for text and files. Perfect for data integrity verification, file checksums, and error detection.
.env File Validator
Validate .env configuration files for syntax errors, security issues, and best practices. Privacy-first: all validation happens in your browser.
SQL Formatter
Format and beautify SQL queries with syntax highlighting. Clean up messy SQL, customize indentation, and improve code readability.