Your Unique ID
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Bulk Generator
What is a UUID / GUID?
UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are synonyms for a 128-bit number used to uniquely identify information in computer systems. They are standardized by the Open Software Foundation (OSF).
Why Use Version 4 (v4)?
There are 5 versions of UUIDs. This tool generates Version 4, which is based on random numbers.
- Uniqueness: The probability of a collision (two codes being simpler) is so astronomically low that you would need to generate billions of UUIDs per second for years to find a match.
- Privacy: Unlike Version 1 (which uses your MAC address), v4 is completely random and contains no identifying hardware information.
Common Use Cases
Database Primary Keys
Using UUIDs allows you to merge records from different databases without ID conflicts (unlike auto-increment integers).
Session IDs
Securely track user sessions in web applications without revealing sequential user counts.
Filenames
Prevent file overwrites on user uploads by renaming files to a unique UUID (e.g., f47ac10b.jpg).