UUID Generator Online — Generate UUID v4 in Bulk Free
Generate random UUID v4 values online for free. Bulk generation, multiple formats (hyphenated, compact, uppercase). No signup, instant results.
b670fe4e-c0c9-4ba7-96be-bddb85f329599662334d-2d75-4ad4-a6ed-d32ce9c6e19e0e993618-8d0a-4e87-882f-ebd3afa7cc86c51f508e-77ce-4f9d-bce8-0b34e80fec4029963b78-0885-42e8-a14b-2cbd2d45ace7Generate RFC 4122 compliant UUIDs (GUIDs) in version 4 format. Create single UUIDs or batches for database records, API tokens, and unique identifiers.
How to use UUID Generator Online — Generate UUID v4 in Bulk Free
- Choose how many UUIDs you need (1 to 1000).
- Click Generate to create random version 4 UUIDs.
- Copy individual UUIDs or download the full batch.
Features
- Generates RFC 4122 version 4 (random) UUIDs.
- Batch generation up to 1000 UUIDs at once.
- Optional uppercase formatting and brace wrapping.
- One-click copy or download as a text file.
FAQ
What is the difference between UUID and GUID?
They are the same thing. UUID (Universally Unique Identifier) is the RFC 4122 standard name. GUID (Globally Unique Identifier) is Microsoft's name for the same concept. Both are 128-bit identifiers, typically shown as 36-character strings with hyphens.
How unique is a version 4 UUID?
Version 4 UUIDs use 122 random bits, giving 2^122 possible values. The probability of a collision is effectively zero for practical purposes — you'd need to generate billions per second for millions of years to have a meaningful chance.
Can I use these UUIDs as database primary keys?
Yes. UUIDs are commonly used as primary keys in distributed systems. Note that random UUIDs can cause index fragmentation in some databases. If that's a concern, consider UUID v7 (time-ordered) or ULID.