UUID / GUID Generator

When this tool is a good fit

UUID / GUID Generator helps when you need single or bulk UUID/GUID values ready to copy from the number of UUID v4 values needed. It is most useful for creating identifiers for tests, fixtures, database rows, events, jobs, and temporary integration records. The notes below focus on the settings that matter, the checks worth doing before you export, and the limits that tend to cause mistakes.

• Takes the number of UUID v4 values needed.
• Lets you adjust quantity, casing expectations, and whether the target system wants UUID or GUID terminology.
• Calls out what to review: duplicate values, line count, and whether braces or prefixes are required by the consuming system.
• Produces single or bulk UUID/GUID values ready to copy.
• Fits common jobs such as creating identifiers for tests, fixtures, database rows, events, jobs, and temporary integration records.

Example jobs

• Generate five UUID v4 values for test database records.
• Create uppercase GUIDs with braces for a Windows-oriented workflow.
• Export a list of UUIDs as a text file for fixtures or sample data.

How to use UUID / GUID Generator

1. Prepare the number of UUID v4 values needed.
2. Set quantity, casing expectations, and whether the target system wants UUID or GUID terminology before running the tool.
3. Generate or process the result, then review duplicate values, line count, and whether braces or prefixes are required by the consuming system.
4. Copy, export, or download single or bulk UUID/GUID values ready to copy.
5. Run a second pass if the destination system, document, or workflow has stricter requirements.

What to know before you use it

• UUID v4 values use the browser crypto-backed crypto.randomUUID() API.
• Formatting options are applied locally after generation without changing the underlying random value.
• The timestamp-style option is intended for local test identifiers, not strict RFC 4122 v1 node identifiers.
• Version 4 UUIDs are random identifiers; they do not encode time, machine identity, or business meaning.
• Random UUIDs are good for uniqueness in tests and records, but they are not a replacement for access tokens or secrets.

Checks and edge cases

• Generate fresh IDs for fixtures instead of reusing production identifiers in screenshots or test data.
• Do not infer creation time or ordering from UUID v4 values because they are intentionally random.

How your data is handled

UUIDs are generated in your browser. Toolumina does not upload, log, or reserve generated identifiers.

FAQ