Free browser tool
UUID Generator
Generate one or many UUID v4 identifiers in your browser, with uppercase, hyphenless, and braced output options.
Updated 2026-05-12
Example presets
Warning: UUIDs are identifiers, not authentication secrets. Use a security token API for passwords, sessions, or reset links.
Ready to generate UUID v4 values.
- Count
- 0
- Format
- v4
- Characters
- 0
How to use this tool
- Paste or type your input into the tool.
- Choose the action or option that matches your task.
- Review the output before copying it into another app.
Notes
Create validated batches of local UUID v4 values, switch output formats, copy the result, and avoid using identifiers as security secrets.
Inputs are processed in the browser for this static MVP. Avoid pasting secrets into any online tool unless you understand the environment.
FAQ
What version of UUID does this generate?
The tool generates UUID v4 values, which are random identifiers commonly used for records, fixtures, examples, and systems that need non-sequential IDs.
Should I use this for security tokens?
No. UUIDs are identifiers, not authentication secrets. Use a purpose-built security library or platform API for passwords, session tokens, and reset links.
Why would I remove hyphens or use uppercase?
Some imports, databases, or legacy systems expect a specific UUID shape. The value is still a UUID v4, but the display format changes for compatibility.
How many UUIDs can I create at once?
This tool accepts 1 to 100 per batch so the browser stays responsive and the output remains easy to scan, copy, and paste into test data.