Generate a Random UUID
Quickly generate random UUIDs. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate a Random UUID
- 1. Set how many UUIDs. Enter How many UUIDs to decide how many version-4 unique identifiers the generator produces, from a single value to a batch for seeding test records.
- 2. Choose the letter case. Turn on Uppercase if your target system displays UUIDs in capital hex digits, or leave it off for the standard lowercase format.
- 3. Set a separator. Choose Separator, typically a newline, so each UUID lands on its own line ready to paste into a database seed script or API mock.
- 4. Copy the UUIDs. Copy the generated identifiers directly into your project. Each follows the standard 8-4-4-4-12 hyphenated UUID format.
When to use Generate a Random UUID
Generate a Random UUID produces standard version-4 unique identifiers, the format used across REST APIs, databases, and distributed systems to key records without a central counter. It is built for anyone who needs test or placeholder IDs on demand.
- Mocking API responses during frontend development. A frontend developer building UI against an API that is not ready yet needs realistic resource IDs to hard-code into mock JSON responses.
- Seeding a NoSQL database with sample records. Someone setting up test data for a document database that uses UUIDs as primary keys needs a batch of valid identifiers to populate sample entries.
- Generating idempotency keys for testing. A developer testing an API endpoint that requires a unique idempotency key per request needs fresh UUIDs to avoid triggering duplicate-request handling during tests.
- Naming temporary files in a script. An engineer writing a build script wants a unique suffix for a temporary output file to avoid collisions when multiple builds run in parallel.
Examples
A single random UUID
Output
f47ac10b-58cc-4372-a567-0e02b2c3d479
Uppercase UUIDs
Output
F47AC10B-58CC-4372-A567-0E02B2C3D479
About the Generate a Random UUID tool
Generate a Random UUID does its work locally, right in the browser. Quickly generate random UUIDs. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Random Tools collection on EditSafely, a set of 120 small, focused Random utilities that share the same instant, private workspace.
You can shape the output with 3 settings, including How many UUIDs, Uppercase and Separator, and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Generate a Random UUID cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.