Five IDs
5 lowercase UUID v4 valuesFive random UUIDs
UUID Generator
Use this free UUID generator to create browser-generated UUID v4 values for identifiers, test data, database records, and development workflows.
Inputs explainedResult checksExample valuesRuns in your browser
Examples
Recent answers
Generated UUIDs are not saved in recent history.
UUIDs are generated locally with browser random values. Use them for identifiers, test data, and development workflows.
Inputs and recent answers stay in this browser tab and are not sent to a server.
How to use the UUID Generator
- Enter how many UUID v4 values you need.
- Choose uppercase or no-hyphen formatting only when another system expects it.
- Press Generate UUIDs and copy the output.
- Use UUIDs as identifiers, not as passwords, secrets, or authorization proof.
What people use it for
Generate IDs for mock data, test records, fixtures, or local prototypes.
Create one UUID or a small batch at once.
Choose uppercase or compact no-hyphen formatting when another system needs it.
Avoid sending identifier-generation requests to a server.
Quick examples
Uppercase ID
1 uppercase UUIDUppercase formatted UUID
Compact IDs
3 UUIDs without hyphens32-character identifiers
Need the guide or a nearby tool?
Need a slower walkthrough, a related generator, or the full library? These links keep you close to the task you started.
- How to use the UUID GeneratorSee slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Developer ToolsBrowse related calculators and utilities in the same category.
- Developer Utility Tools HubCompare this with the nearby tools and checks in the same job path.
- Tool and utility guidesFind more guides that use real tool inputs, examples, mistakes, and result notes.
- All free toolsSearch every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the UUID Generator?
Use it when your task matches one of these common needs: Generate IDs for mock data, test records, fixtures, or local prototypes. Create one UUID or a small batch at once. It works best when you already know the text, code, URL, mode, format, or technical setting the page asks for.
What is the UUID Generator doing with my inputs?
In plain language: The generator creates random bytes in the browser, sets the UUID version and variant bits for UUID v4, then formats the identifier. The examples on the page are there so you can compare your inputs with a filled-out example before copying the answer.
What do the main UUID Generator inputs mean?
The main inputs are usually text, code, a URL, a number base, or a mode setting. Paste only the part you want the tool to work on and compare the output with the examples.
How should I read the UUID Generator answer?
Read the output next to your original input. If the tool changes format, units, encoding, spacing, or capitalization, compare a small sample before copying the whole result into another app.
What should I double-check before trusting the answer?
UUIDs are useful identifiers, but they do not prove identity, authorization, ordering, or secrecy by themselves. Also check the selected mode, input format, encoding, and whether the text includes private keys, passwords, or sensitive data.
Are UUID v4 values sequential or sortable?
No. UUID v4 values are random identifiers, not timestamps or ordered numbers. They are good when you need a hard-to-guess unique-looking ID, but they should not be used when a database, log, or file list needs chronological order.
Can I use a UUID v4 as a secret token?
Do not treat a UUID as a password reset token, login secret, API key, or proof of permission. For security workflows, use a purpose-built random token with enough entropy, short expiration, server-side storage or hashing, and checks that match your app threat model.
Does the site save what I enter?
No. The tool runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.