Need a UUID? The ChrysoKit UUID Generator produces cryptographically random v4 UUIDs, one at a time or in bulk, with the format options developers actually use.
Why use it
Web Crypto randomness, no telemetry, instant copy. The generator runs locally; the UUIDs it gives you were never anywhere else.
How to use the UUID Generator
- Click Generate one for a single UUID, or set a bulk count (up to 1000).
- Pick a format: lowercase, UPPERCASE, no hyphens, or wrapped in braces.
- Copy a single value with the copy icon, copy all, or download the bulk list as a .txt file.
Features worth knowing
v4 only, cryptographically random
Every UUID is 128 bits, of which 122 are random and 6 are reserved for the version and variant marker. v4 is the right default for distributed IDs and the most common choice. v1 and v7 (time-based UUIDs) are on the roadmap.
Bulk mode
Generate up to 1000 UUIDs in one go for seeding test data, populating a fixture file, or stress-testing an import script.
Four format options
lowercase, UPPERCASE, no-hyphens, and braces (Microsoft Registry style). Pick the one your target system expects.
Pro tips
- v4 is the right default unless you have a specific reason to pick another version. The randomness is plenty for distributed primary keys.
- If you need time-sortable IDs (better index locality), look up v7. Once it ships in the tool you can swap straight in.
- Download bulk lists as .txt to seed a test database or feed into a fixture script.
Privacy first. The UUID Generator runs entirely in your browser. Nothing you generate is sent to a server.
Pair the UUID Generator with bulk mode when you are seeding a database; reach for one-at-a-time when you just need a fresh ID. Copy and move on.
Open the tool: UUID Generator →