Tools / UUID Generator
UUID Generator
Generate UUID v4 identifiers in bulk, right in your browser. Choose the count, case, and format — nothing is uploaded.
2befd84f-9fb5-4f98-9c33-8b0f378c3866#1e6befcf8-0d62-492f-90bf-a425f66e7bf0#27d7d1904-fd7c-41aa-a3c7-bc9cffe8a532#371733df3-77d6-479f-8e0a-7e9b2e2c89d2#4de0472a8-c803-4de3-8b7a-432096c90e64#5
// About this tool
UUID Generator
This UUID generator creates random version-4 UUIDs using your browser's cryptographic random number generator. Generate a single identifier or up to 100 at once, in lowercase or uppercase, with or without the standard dash separators.
Everything runs locally — nothing is uploaded, and the generator works fully offline. There is no server involved, so there is nothing to log and no rate limit.
UUID v4 is the standard random format, ideal for database keys, test data, file names, and any identifier where you need 122 bits of randomness.
// When to use it
Seed a database with test data
Generate 50 UUIDs at once and paste them into a seed script or fixture file.
Create unique file or object names
Generate a fresh identifier for a file, S3 object, or entity that needs a collision-resistant name.
Work in uppercase or no-separator formats
Some systems want uppercase UUIDs or 32-char hex with no dashes — the options cover both without manual reformatting.
// Questions
Is my UUID uploaded anywhere?
No. Generation happens entirely in your browser using the Web Crypto API. Nothing is sent to a server.
What UUID version does this generate?
Version 4 (random). Each UUID is built from cryptographically random bytes, so identifiers are collision-resistant for practical purposes.
Can I generate more than 100 at once?
The UI caps the count at 100, but you can hit Regenerate as many times as you like — there is no server-side limit because nothing is uploaded.
Does it work offline?
Yes. The generator uses only browser APIs, so it works with no network connection at all.
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