UUID Generator Online - Free Random UUID v4 (Batch)
1 min read
Need a unique ID for a database row, an API resource, a test fixture, or a merge key? The UUID generator mints cryptographically random v4 UUIDs - one or a thousand - instantly, with no upload.
Quick answer
Open the UUID generator, pick a count (1–1000), copy the list.
Step-by-step
- Go to getconvertify.me/tools/uuid.
- Set Count (default 10, up to 1000).
- Hit Regenerate for a fresh batch, or Copy all to grab them.
Why UUID v4
- Collision-proof enough - 122 bits of randomness; duplicate-free in practice.
- No coordination - generate IDs offline without asking a server.
- Standard format -
8-4-4-4-12hex, universally accepted.
When you'd use it
- Seed data - mock IDs for frontend work and API mocks.
- Database defaults -
gen_random_uuid()in Postgres uses the same idea. - Test fixtures - stable-looking but unique keys for e2e runs.
- Tracking codes - order IDs, reference numbers, idempotency keys.
Secure & local
Generated via the browser's crypto.randomUUID() - a CSPRNG, not a weak Math.random() guess. Everything happens locally; no key is ever sent to a server.
Common questions
What's the difference between UUID versions? v4 is random. v1 is time-based, v5 is hash-based. For almost everything, v4 is the right choice.
Do you store my generated UUIDs? No - generation is 100% local and nothing is recorded.