Free Online Developer Tools
Fast, private, no sign-up required. All processing happens in your browser.
Encoding
Base64 Encode / Decode
Encode and decode Base64 strings instantly
Formatting
JSON Formatter & Validator
Format, validate, and beautify JSON data
Generators
UUID Generator
Generate random UUID v4 identifiers
Encoding
URL Encode / Decode
Encode and decode URL components
Date & Time
Unix Timestamp Converter
Convert between Unix timestamps and dates
Security
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Reference
ASCII Table
Interactive ASCII character reference table
Security
JWT Decoder
Decode and inspect JSON Web Tokens
All tools run entirely in your browser. No data is ever sent to a server.
Your privacy is our priority.