Developer Tools
Essential developer utilities. Format JSON, test regex, generate UUIDs, encode Base64, decode JWTs, build cron expressions, and hash strings.
Essential Tools for Every Developer
These tools solve the tasks developers encounter daily — formatting JSON from API responses, testing regular expressions before deploying, generating secure passwords for new accounts, and decoding JWT tokens during authentication debugging. Every tool runs entirely in your browser using Web Crypto API for security-sensitive operations like password generation and hash computation.
Most Popular Developer Tools
The JSON Formatter & Validator is the most-used tool — paste minified JSON, get instant formatting with tree view, error highlighting, and auto-fix for common issues like trailing commas and unquoted keys. The Regex Tester provides real-time match highlighting, capture group extraction, code generation for JavaScript/Python/PHP/Go, and a replacement mode for testing string.replace() patterns.
For authentication and security, use the JWT Decoder to inspect token claims and expiry, the Password Generator with entropy estimation, and the Hash Generator for MD5, SHA-256, and SHA-512 with file hashing support.
Data Format & Conversion Tools
Convert between data formats with the JSON to CSV Converter (auto-detects columns, flattens nested objects) and the JSON to YAML Converter (bidirectional, perfect for Kubernetes configs). The Base64 Encoder handles text and file encoding with image preview, while the SQL Formatter beautifies queries with proper keyword casing and indentation.
For DevOps and system administration, the Cron Expression Generator builds schedules visually with timezone support, the UUID Generator creates v4/v7/ULID identifiers with a validator mode, and the Chmod Calculator makes Linux file permissions easy to understand.