UUID Generator
Generate random UUID / GUID v4 in bulk.
100% private — runs in your browser, nothing is uploaded.
How to use the UUID Generator
- 1Set how many
Choose how many UUIDs to generate at once (up to 500).
- 2Choose formatting
Optionally switch the output to uppercase.
- 3Generate and copy
Click Generate for a new batch, then Copy all to grab the whole list.
Free online UUID / GUID generator
This UUID generator creates random version 4 UUIDs (also known as GUIDs) in bulk. UUIDs are widely used as database primary keys, API request IDs, file names and distributed identifiers because they are unique without coordination.
Features
- Generate 1 to 500 UUIDs at once.
- Optional uppercase formatting.
- One-click copy of the whole list.
- Cryptographically secure and fully browser-based.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit value used to uniquely identify records, files or objects without a central authority. This tool generates version 4 (random) UUIDs.
Are these UUIDs random and safe to use?
Yes. They are generated with the browser's cryptographically secure crypto.randomUUID(), so collisions are effectively impossible.
Can I generate many at once?
Yes — set the amount (up to 500) and copy them all with one click.
What is the difference between UUID and GUID?
They are the same thing. GUID (Globally Unique Identifier) is Microsoft's name for a UUID (Universally Unique Identifier). This tool generates standard version 4 values that work as both.
Can two UUIDs ever be the same?
In practice, no. A version 4 UUID has 122 random bits, so the chance of a collision is astronomically small — you can generate billions without worrying about duplicates.