About the UUID Generator
Universally unique identifiers (UUIDs) are used to label records, sessions, and files without a central counter. Version 4 UUIDs, in particular, offer 122 random bits, making collisions practically impossible. Our online UUID generator uses the crypto.randomUUID() function to generate cryptographically secure v4 identifiers.
Choose your quantity and format for one or up to 1,000 identifiers at once. Store UUIDs as binary(16) or a native UUID column in databases โ not as 36-character strings โ for speed.
How to use the UUID Generator
- Step 1: Choose the number of UUIDs you want to generate. Select from 1 to 1,000 identifiers.
- Step 2: Select the format you prefer. Choose from uppercase, lowercase, or with hyphens.
- Step 3: Click Generate to create your random UUID v4 identifiers.
- Step 4: Copy all the generated UUIDs or download them as a text file for further use.
Tips & benchmarks
- Use our generated UUIDs in databases to optimize performance by storing them as binary(16) or native UUID columns instead of as 36-character strings. Our recommended format is binary(16).
- The number of generated UUIDs: Use up to 1,000 identifiers at once.
- Conversion rates: 1 second โ 2-3 seconds for small quantities.
- Compatibility: Works on all modern browsers and devices with JavaScript enabled.
Frequently asked questions
Are the generated UUIDs truly unique and cryptographically secure?
Yes, our online UUID generator produces truly unique and cryptographically secure Version 4 UUIDs using the crypto.randomUUID() function. This ensures that there is no chance of collisions or overlaps.
Can I generate UUIDs in a different format?
Yes, you can select from uppercase, lowercase, or with hyphens for your generated UUIDs. Simply choose your preferred format in Step 2 of the generator.
How long does it take to generate UUIDs?
The time taken to generate UUIDs varies based on the number of identifiers you wish to generate. For small quantities (1-100), it takes approximately 1-2 seconds.
Can I use these UUIDs in my application without any issues?
Yes, our generated UUIDs are compatible with most applications and databases. However, ensure that you store them correctly to optimize performance.
Will the generated UUIDs collide or overlap?
No, due to their 122 random bits, Version 4 UUIDs offer practically zero chance of collisions or overlaps. This makes them ideal for various use cases.
Can I upload files to generate UUIDs?
No, all processing happens in the visitor's browser. You don't need to upload any files to generate UUIDs with our online generator.
All tools on 24SevenUpdates are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.