Generate random version 4 UUIDs in your browser. Create identifiers for test records, sample data, or development tasks.
How to use
Choose a count from 1 to 1,000 and generate the list. Copy one UUID per line into the system that needs it.
Example
Use one generated UUID as a sample record ID and another for a second record. Do not use a single copied example for every record.
FAQ
Is uniqueness guaranteed?
Random UUIDs have a very low collision probability, not a universal guarantee. Enforce uniqueness in storage when your application requires it.
Related tools
A practical task
Generate a separate value for each test record and keep it stable once references point to it. Regenerating an ID during every page render breaks links between records even if each fresh value has the right UUID shape.
Another useful question
Is a UUID an access token?
Do not equate an identifier with authorization. Access to a record still needs permission checks, even when its ID is difficult to guess.
Settings and formats
| Field | Values |
|---|---|
| Count | Starting value: 5; bounds: 1 / 1000 |
Details for interpreting the result
| Detail | Explanation |
|---|---|
| Identifiers and labels | A display label helps people recognize an item; an identifier distinguishes records. Decorative text, initials, and sample names are not reliable unique identifiers. Keep a separate stable key when records must remain distinct. |
| UUID shape and use | A standard UUID string includes fixed groups of hexadecimal characters and separators. Shape validation only confirms a representation. It does not confirm that a corresponding record exists or that a caller is allowed to access it. |
| Cryptographic random source | A cryptographic random source is intended for unpredictable sampling. It does not certify a selection process, prove that entrants were eligible, or create an audit trail for a contest or regulated drawing. |
| Stable record references | Once a record is created, references must keep using its stored key. A new random identifier on every render describes a different label rather than preserving the existing relationship. Generate at creation and reuse deliberately. |
| Database uniqueness | Low collision probability and enforced uniqueness solve different problems. If duplicate identifiers would break data, use a uniqueness constraint in storage and handle a rejected insertion. Random generation alone is not that database constraint. |
| Record access | Knowing or guessing an identifier does not establish permission to read or edit its record. Check the requesting account and action on the server. Obscure keys can reduce accidental discovery but cannot replace authorization. |