UUID Generator
Generate random (v4) or time-based (v1) UUIDs in bulk — private, instant, free.
Version 4 UUIDs use your browser’s cryptographic random source. Nothing is sent to any server.
How to use the UUID Generator
- Choose UUID version v4 (random) or v1 (time-based).
- Set how many UUIDs you need (1–100) and click Generate.
- Copy one, copy all, or download the list as a text file.
UUID Generator FAQs
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit ID written as 32 hex digits in five groups, like 550e8400-e29b-41d4-a716-446655440000. It is used as a database key, session ID or record ID where a simple counter would collide or leak information.
What is the difference between UUID v1 and v4?
UUID v4 is fully random — every value is unpredictable, which is what most apps want. UUID v1 is built from the current timestamp plus a random node, so values sort roughly by creation time; use it when you need time-ordered IDs.
Are these UUIDs really unique?
Version 4 UUIDs have 122 random bits, so the chance of two ever colliding is effectively zero for any realistic use. Version 1 values are unique as long as the timestamp and random node differ between generators.
Can I generate many UUIDs at once?
Yes — generate up to 100 at a time, then copy them all or download the list as a plain text file, one UUID per line.
Is this UUID generator safe to use?
Yes. Generation happens entirely in your browser using its cryptographic random source, and nothing is sent to any server.
Free UUID Generator — Random v4 & Time-Based v1 UUIDs
This free UUID generator creates random version 4 or time-based version 1 UUIDs in bulk, right in your browser. Generate one or one hundred, copy them instantly, or download the list as a text file — no sign-up and no server involved.
How to use it, step by step
- Pick version v4 for random IDs or v1 for time-ordered IDs.
- Set the quantity (1–100) and click Generate UUIDs.
- Copy a single UUID, copy all, or download the full list.
Popular uses
- Databases: primary keys that never collide across systems.
- APIs and sessions: unpredictable tokens and request IDs.
- Testing: realistic sample IDs for development and QA.
- Data migration: stable identifiers when merging records.