Developer Swiss Army Knife
Free Developer Tools
Essential utilities for developers. Fast, free, and runs entirely in your browser.
JWT Decoder
Base64
UUID Generator
Cron Builder
Epoch Converter
Hash Generator
Regex Tester
URL Tools
Base Converter
Password Gen
HTML Entities
UUID Generator
Generate UUIDs v4 & v7
Options
UUID v4: Cryptographically random. Best for most use cases. Extremely low collision probability.
UUID v7: Time-ordered (Unix-ms prefix) + random. Sortable by creation time — great for database keys.
NIL: The all-zeros UUID, used as a placeholder/empty value.
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