UUID Generator guide
How to Generate UUIDs and GUIDs in Bulk
Choose UUID v1, v4, v6 or v7, generate a batch and export TXT or CSV. Understand formatting, time ordering and identifier limitations.
Open UUID Generator →Before you start
- Check which UUID version and string format your application expects. GUID is a common name for the same identifier format.
- Use UUIDs as identifiers, not authentication secrets. Versions containing timestamp information can reveal creation-time information.
Step-by-step instructions
- Open the UUID & GUID Generator and choose version 1, 4, 6 or 7.
- Choose a preset quantity or enter a number from 1 to 1,000.
- Set lowercase or uppercase, hyphens and optional braces to match the receiving application.
- Generate the batch and review a few identifiers. Formatting changes representation, not the underlying identifier value.
- Copy an individual UUID or the whole list, or download TXT or CSV. Enforce uniqueness in your application where required.
Choose v4 or a timestamp-based version
Version 4 uses random data and is a common choice when creation-time ordering is unnecessary. Version 7 combines a Unix timestamp with random data and can be useful when identifiers need time ordering. Choose based on your system’s requirements rather than treating one version as universally better.
Version 1 is timestamp-based. Version 6 rearranges timestamp fields for ordering. The generator supports these four versions; it does not generate v3, v5 or ULIDs and does not validate or decode arbitrary existing identifiers.
Identifier formatting and uniqueness
A conventional UUID has 32 hexadecimal digits displayed in groups separated by hyphens. Some systems expect uppercase or braces; others require the conventional representation. Confirm compatibility before importing a batch.
Random UUID collision probability is extremely small when generation works correctly, but the site does not promise zero collisions. Database constraints remain useful. Time-based identifiers should not be used to conceal when an item was created.
Conventional format:
550e8400-e29b-41d4-a716-446655440000
Uppercase with braces:
{550E8400-E29B-41D4-A716-446655440000}Troubleshooting
The application rejects an identifier
Check the expected version, hyphens, braces and case. Restore the conventional format if the application accepts only standard UUID strings.
I need more than 1,000 identifiers
Generate separate batches and review your importing workflow. The page deliberately limits each batch to 1,000.
The IDs contain time information
That is expected for timestamp-based versions. Use an appropriate identifier scheme for your privacy needs and never treat UUIDs as passwords.
Privacy and cleanup
Generation happens locally in the browser. UUID results are not uploaded. Copying and downloading are explicit; store exported identifiers according to your application’s requirements.
Read the Privacy Policy for site preferences, optional analytics and hosting information.
Related tools and guides
Use UUID Generator with the steps above, or continue with a related task.
Technical references
These references explain the underlying formats or browser behavior. The steps above describe the current AnyUtils tool.