What is UUID Generator?
This UUID generator is a browser-only tool for creating random identifiers. Each click outputs RFC 4122 v4 UUIDs with the standard 8-4-4-4-12 structure (36 characters with hyphens). Generate 1 to 100 at once via the slider, and choose lowercase, uppercase, or hyphen-free output. Copy any single UUID or all of them with one click. Everything is generated locally — no server, no uploads. Ideal for database primary keys, order IDs, test data, and filenames that need unique identifiers.
▶Use Cases5 scenarios
- ◆Database primary keys and unique business identifiers
- ◆Bulk test data for API development
- ◆Order and transaction reference numbers
- ◆Temporary filenames and resource IDs
- ◆Unique keys for frontend components
▶How to Use5 steps
- 1Open the page — no signup needed
- 2Pick a quantity from 1 to 100 with the slider
- 3Choose format: lowercase, uppercase, or no hyphens
- 4Click Generate
- 5Copy a single UUID or all of them
▶Features8 features
- ✓Free
- ✓No signup
- ✓Random v4 UUIDs
- ✓Generate 1-100 at once
- ✓Lowercase, uppercase, or hyphen-free
- ✓Copy single or all
- ✓100% client-side
- ✓Works on mobile
▶FAQ7 questions
What is a UUID generator?
An online random identifier tool. Input: quantity (1-100) and format options (lowercase, uppercase, hyphen-free). Output: that many v4 UUIDs. Used for database primary keys, order IDs, and test data. Everything runs locally in your browser.
Which UUID version does it generate?
Version 4, the fully random variant. The 13th hex character is fixed to 4 and the 17th to 8/9/a/b; all other bits come from random data.
How many UUIDs can I generate at once?
Up to 100. The quantity slider ranges from 1 to 100.
Can I remove the hyphens?
Yes. The hyphen-free format outputs 32 hex characters, useful for 32-char ID columns.
Are results unique?
v4 uses 122 bits of random entropy, so duplicates are practically impossible in normal use.
Is my data uploaded?
No. UUIDs are generated locally with Math.random; no network requests are made.
Can I use it in production?
Yes for most cases; for stricter randomness requirements, prefer crypto.randomUUID(). This tool suits regular business and testing needs.