UUID Generator
Generate unique IDs.
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About UUID Generator
Generate version 4 UUIDs (universally unique identifiers) instantly in your browser. Pick how many you need, then toggle uppercase output or strip the hyphens to match your database, API keys, or config format. Copy every UUID at once, or hit Regenerate for a fresh batch.
This tool is completely free with no sign-up, limits, or ads. It runs entirely in your browser using the built-in crypto.randomUUID generator, so the identifiers are created on your own device and nothing is ever sent to a server.
Frequently asked questions
- Is this UUID generator free?
- Yes, it is 100% free with no account, sign-up, or usage limits. Generate as many UUIDs as you need, as often as you like.
- Is my data uploaded or stored anywhere?
- No. Every UUID is generated locally in your browser using the native crypto.randomUUID function. Nothing is sent to a server, logged, or stored, so the values stay completely private to you.
- What version of UUID does this generate?
- It generates version 4 (v4) UUIDs, which are based on random numbers. This is the most common type, used for database keys, session IDs, request IDs, and general-purpose unique identifiers.
- Are these UUIDs truly unique and safe to use?
- Version 4 UUIDs are generated from 122 random bits using your browser's cryptographically secure random generator. The chance of a collision is so vanishingly small that they are treated as unique in practice for databases and distributed systems.
- Can I generate multiple UUIDs at once?
- Yes. Enter any number up to 100 in the How many field and every UUID appears in the output box. Use the Copy button to grab them all at once, one per line.
- What do the uppercase and remove hyphens options do?
- Uppercase converts letters a-f to A-F, and remove hyphens strips the four dashes to give a compact 32-character string. Both are useful for matching specific database, filename, or API formats.