Bulk UUID Generator
Need unique IDs? This mints them from a cryptographically secure random source — never Math.random — in v4, or v7 when you want time-ordered values. Generate in bulk, toggle case and hyphens, then copy or download the list. Just keep in mind that UUIDs are identifiers, not secrets.
- 100% free
- Private & safe
- Runs in your browser
Why use UUID Generator?
UUID Generator runs locally using your browser's built-in cryptography, so passwords, keys and hashes are never uploaded or logged.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Handles UUID v4 (random); UUID v7 (time-ordered).
- Choose the version: v4 (random) or v7 (time-ordered).
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
What it can do — and its limits
- Generates RFC 9562 version 4 (random) and version 7 (time-ordered) UUIDs.
- Bulk-generates many IDs at once and copies them in one click.
- Generated in your browser using the platform's secure random source.
How to use UUID Generator
- Choose the version: v4 (random) or v7 (time-ordered).
- Set how many to generate, up to a safe maximum.
- Toggle uppercase and whether to include hyphens.
- Copy one, copy all, or download the list as a .txt file. Regenerate any time.
Examples
- Generating 50 v4 UUIDs to seed a test database.
- Creating a single v7 ID that sorts by creation time.
Worked example
Input
Version 7, quantity 3.
Output
0190e9a2-... , 0190e9a2-... , 0190e9a2-... — note the shared time-based prefix, so they sort in creation order.
Supported formats & limits
- UUID v4 (random)
- UUID v7 (time-ordered)
UUID v4 vs v7
| v4 | v7 | |
|---|---|---|
| Basis | Random | Unix timestamp + random |
| Sortable by time | No | Yes |
| Best for | General unique IDs | Database primary keys, ordered inserts |
Limitations
- UUIDs are identifiers, not passwords or encryption keys — do not use them as secrets.
- v7 encodes a timestamp, which reveals roughly when it was created.
Common problems & fixes
Not sure whether to pick v4 or v7.
Use v4 for general random IDs; use v7 when you want database keys that sort by creation time.
Worried about collisions.
v4 has 122 random bits — collisions are astronomically unlikely for normal volumes.
Sources & references
Last verified August 2026.
Frequently asked questions
Are these UUIDs cryptographically random?
Yes. We use the Web Crypto API's secure random source, never Math.random.
Should I use a UUID as a password?
No. A UUID is an identifier and may be exposed in logs or URLs; use a proper secret for authentication.
What is the difference between v4 and v7?
v4 is fully random; v7 is time-ordered, so generated IDs sort roughly by when they were created.