UUID Generator
Generate universally unique identifiers (UUIDs) instantly. Supports Version 1 and Version 4.
UUID Generator — Unique IDs in One Click
UUIDs are the standard way to create identifiers that will never collide — for database keys, session tokens and distributed systems. This free generator produces RFC 4122 compliant version 4 (random) and version 1 (time-based) UUIDs, up to 100 at a time.
Version 4 IDs use your browser's cryptographically secure random number generator, so they are safe for tokens and secrets. Generate a batch, copy them all at once, and regenerate any time — everything happens locally with no signup.
Version 1 and version 4
Choose time-based v1 UUIDs (which embed a timestamp) or random v4 UUIDs (the default for most uses) from the dropdown.
Bulk generation and copy all
Set the quantity up to 100, generate the whole batch at once, and copy every UUID to your clipboard with a single click.
Private and secure
Random UUIDs are generated with crypto.getRandomValues() — the browser's cryptographic RNG — and never touch a server. Note that v1 UUIDs embed a timestamp, so prefer v4 when privacy matters.
How to use
- Choose Version 4 (random) or Version 1 (time-based).
- Set how many UUIDs you need (1-100).
- Click Regenerate to create the batch.
- Use Copy All to copy every UUID at once.
Frequently Asked Questions
What is a UUID?
A Universally Unique Identifier is a 128-bit label like 550e8400-e29b-41d4-a716-446655440000. The space is so large that randomly generated UUIDs are effectively guaranteed unique without coordination.
What is the difference between v1 and v4?
Version 1 embeds a timestamp and a node identifier; version 4 is purely random. Use v4 unless you specifically need the timestamp embedded in the ID.
Are these UUIDs safe to use as tokens?
Version 4 UUIDs from this tool use the browser's cryptographic random number generator, making them unpredictable. For high-security secrets consider longer dedicated tokens, but v4 UUIDs are fine for IDs and non-critical tokens.
Is anything sent to a server?
No. Generation happens entirely in your browser — your UUIDs never leave your device.
Can I generate UUIDs in bulk?
Yes. Set the quantity up to 100 and generate the whole batch at once, then copy them all with one click.
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