Three straightforward steps
- Choose or paste the input requested by this tool.
- Configure the options and run the operation locally.
- Review and download or copy the result.
Developer TOOL
UUID Generator
Generate one or many RFC 4122 version 4 UUIDs using the browser crypto API.
ON-DEVICESelected input is processed in this browser.
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The selected input stays under your control
On-device processing means the input is handled by browser APIs on the device running this page. Closing or refreshing the page normally clears the active in-memory working session.
Read the Privacy Policy →Generate RFC 4122 version 4 UUID values
Create one or many random identifiers with the browser crypto API.
How to use it
- Choose the number of UUIDs.
- Generate version 4 values.
- Copy them into the system that needs identifiers.
Supported input
- Single UUID generation
- Batches of UUID v4 identifiers
Worked example
Generate twenty identifiers for seed records in a local development database.
Limitations
- UUIDs are identifiers, not authentication secrets.
- Random UUIDs do not encode creation time or sequence.
Troubleshooting
- Do not remove hyphens if the receiving system expects canonical format.
- Use a database-generated key when transactional guarantees are required.
Tool-specific questions
Are UUIDs guaranteed never to collide?
Collisions are extraordinarily unlikely, not mathematically impossible.
Can a UUID be used as a password?
No, identifiers should not be treated as credentials.
Before you process
Can I use this uuid generator online without uploading my input?
Yes. This tool is labelled On-device, so the selected input is processed in your browser and is not sent to a ForgeMyFile processing API.
What happens if the browser cannot process it?
The tool shows a readable error and stops. It does not silently fall back to a cloud upload.
Why can performance differ between devices?
The browser is doing the work locally, so speed and practical file size depend on available memory, CPU and browser capabilities.