UUID v4 Generator — Random UUIDs Online
Bulk generate cryptographically secure API keys, salts, tokens, and decode precise millisecond timestamps from UUIDv7.
🔒 Processed entirely in your browser — nothing you enter here is ever uploaded.
The result appears on this page after you run the tool. Nothing you enter is uploaded.
Result
About this tool
This page opens the secrets generator with UUID v4 already selected — set how many identifiers you need, pick an output format and copy the result.
UUID v4 is a fully random 128-bit identifier: 122 of its bits come straight from the browser's cryptographic random generator, making collisions practically impossible. It is the default choice for database keys, request IDs and anywhere you need a unique value that carries no embedded information.
The full tool also generates UUID v7, hex salts and Base64 tokens, exports to .env, JSON and YAML, and decodes UUID v7 timestamps — everything runs locally in your browser, nothing touches a server.
Example. A requested API key is filled from crypto.getRandomValues, and a UUIDv7 is decoded to the millisecond timestamp stored in its first bits.
Limit. Millisecond extraction applies to UUIDv7 only; a version-4 UUID has no embedded time to decode.