UUID Generator
Pick a count and select Generate.
Generate random version 4 UUIDs instantly. Choose how many you need (from 1 to 100), then copy the whole list with one click. Everything runs in your browser using the secure Web Crypto API, so your identifiers never leave your device.
How to use
- Enter how many UUIDs you want, from 1 to 100.
- Select Generate to create the list.
- Review the UUIDs in the output box.
- Select Copy to copy them all to your clipboard.
- Select Reset to clear the output and start again.
Examples
- Count 1 produces a single value like 9b2e4f1a-1c3d-4e5f-8a7b-0c1d2e3f4a5b.
- Count 3 produces three unique UUIDs, one per line, ready to paste.
- Every value follows the v4 pattern with 4 as the version digit and 8, 9, a, or b as the variant digit.
FAQs
- What is a version 4 UUID?
- A version 4 UUID is a 128 bit identifier whose bits are almost entirely random. The version digit is fixed at 4 and the variant digit is 8, 9, a, or b. The format is 32 hexadecimal digits shown in five groups separated by hyphens.
- Are these UUIDs unique?
- Version 4 UUIDs are random, so collisions are extraordinarily unlikely in practice. With 122 random bits the odds of two generated values matching are negligible for any realistic number of identifiers.
- Is this safe to use for sensitive data?
- Generation happens entirely in your browser using crypto.randomUUID or crypto.getRandomValues when available. Nothing is sent to a server, so the values stay on your device. UUIDs are identifiers, not secrets, so do not use them as passwords or tokens.
- Why can I only generate up to 100 at once?
- The limit keeps the tool fast and the output readable. If you need more, generate another batch and append it to your previous list.
- Are the UUIDs uppercase or lowercase?
- They are produced in lowercase, which is the common convention. If your system needs uppercase, you can convert the copied text in your editor or with a case converter.
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