UUID Generator
Generate up to 1,000 random UUID v4 identifiers
Last updated: October 14, 2026
How to use
- Select the number of UUIDs you want to generate (1-1000)
- Choose format options: uppercase and/or include hyphens
- Click "Generate UUID(s)" to create random v4 UUIDs
- Use "Copy" to copy all UUIDs to clipboard or "Download" to save as a file
- Uses the browser Web Crypto API when available; do not use generated UUIDs as passwords or API keys
About UUIDs
UUID v4 generates random 128-bit identifiers. The probability of collision is extremely low (about 1 in 5.3×10³⁶ for a pair of randomly generated v4 UUIDs), so they are useful as identifiers in databases and software systems. UUIDs are not guaranteed unique and are not authentication secrets.
Result actions
Copy or download the tool output, or share a link to UUID Generator.
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Generate random UUID v4 values
Choose how many UUIDs to create, from 1 to 1,000. The output uses UUID version 4 formatting and can be changed to uppercase or have its hyphens removed. Copy the generated list or download it as a text file.
The tool uses crypto.randomUUID() when available and crypto.getRandomValues() as a fallback. In runtimes without Web Crypto it has a last-resort pseudorandom fallback. UUIDs are identifiers, not passwords, API keys, or other authentication secrets, and random UUIDs are not mathematically guaranteed to be unique.
Generation happens in your browser.