UUID Generator
Generate, validate, and explore UUID v4 identifiers. Bulk generate up to 100 UUIDs at once.
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How to use
- Click Generate New to create a cryptographically random UUID v4.
- Use Copy UUID to copy it to your clipboard.
- Toggle Case switches between lowercase and uppercase formats.
- NIL UUID inserts the special all-zeros UUID (00000000-0000-0000-0000-000000000000).
- The format breakdown shows what each section of the UUID represents with color coding.
- Enter any UUID in the validator to check if it is valid and which version it is.
- Set a count (1–100) and click Generate List for bulk UUID generation.
About UUID Format
A UUID (Universally Unique Identifier) is a 128-bit value represented as 32 hexadecimal digits in 5 groups separated by hyphens: xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx
time_low
First 8 chars — 32 bits
time_mid
4 chars — 16 bits
time_hi + version
4 chars — M = version digit
clock_seq
4 chars — N = variant bits
node
12 chars — 48 bits
In UUID v4, the M digit is always 4 and the N digit is 8, 9, a, or b. All other digits are random, giving approximately 2¹²² possible values.