UUID Generator

Create UUID v4 values in batches, choose lowercase or uppercase, switch hyphen and brace formats, and copy the IDs you need.

Use it for database seed data, API examples, logs, fixtures, and test records.

Format choices help match libraries that expect hyphenated, compact, or braced GUIDs.

  • Generate UUID v4 batches
  • Switch case and formatting
  • Copy one or every UUID

How to use UUID Generator

Use these steps to create copy-ready UUID v4 values with the batch size, casing, and punctuation style your destination expects.

  1. 1

    Choose the batch size

    Pick 1, 5, 10, 25, or enter a custom count up to 100. Keep the batch small when you only need one database key or API example.

  2. 2

    Select case and format

    Choose lowercase or uppercase, then keep standard hyphens, remove hyphens for compact storage, or wrap each UUID in braces for GUID-style systems during handoff.

  3. 3

    Generate and copy IDs

    Generate the UUID v4 list, scan for the expected shape, then copy one identifier or the whole newline-separated batch into fixtures, seed data, logs, or docs.

UUID v4 batch generation

Create one to 100 random UUID v4 identifiers per run for seed data, mock records, API payloads, test cases, and temporary labels.

Format controls

Switch between lowercase, uppercase, hyphenated, no-hyphen, and braced outputs so the generated ID matches the receiving system during import.

Copy-ready UUID list

Copy a single value or the full newline-separated list without retyping identifiers into migration notes, issue trackers, or code comments.

Browser Crypto API use

Generation relies on the browser's crypto.randomUUID support, and the page warns when that secure UUID function is unavailable.

Quick test data workflow

Create fresh identifiers for local fixtures, demo accounts, database rows, idempotency keys, and logs without opening a package manager or shell.

Readable output review

The result list keeps every identifier on its own line, making duplicate pastes and wrong format choices easier to spot before copy.

UUID Generator privacy and processing

UUID Generator explains where random ID creation happens, what is stored, and when sign-in is needed so generated values can be handled carefully.

Processing Browser

UUID Generator uses the browser Crypto API to create random UUID v4 values and keeps the generated list in the open page until copied or replaced.

Storage None

Normal UUID Generator use does not save generated IDs server-side; copy the values you need before closing or refreshing the tab.

UUID Generator account access

UUID Generator works without sign-in for one-off IDs, bulk test data, API examples, database fixtures, and log correlation values.

Before You Use UUID Generator

Review these notes before placing generated UUIDs into schemas, API requests, fixtures, public examples, or migration scripts.

Privacy

Generated UUIDs stay in the browser session unless you copy them into another app, repository, ticket, or document.

Do not paste private records just to pair them with IDs; generate the identifiers first, then attach them where access controls exist.

Accuracy

UUID v4 values are random identifiers, not proof of ownership, authentication, sequence, or business meaning.

Check the selected count and format before adding a batch to seed data, database rows, or API examples.

Compatibility

Standard UUID output uses hyphens, while compact output removes hyphens and braced output wraps the value for GUID-style consumers.

If a library rejects a UUID, confirm it expects v4 randomness, the same casing, and the same punctuation style.

Output

Copy one identifier when a single record needs an ID, or copy all when building fixtures and test datasets.

Keep the generated list visible until every pasted destination has the exact count and format you intended.

Limits

UUID Generator creates 1 to 100 UUID v4 identifiers per run in the active browser tab, with standard, no-hyphen, or braced formatting.

The tool generates UUID v4 values only; it does not create UUID v1, v3, v5, v6, or v7 identifiers.

It does not validate existing UUIDs, decode timestamps, or guarantee that downstream systems accept every formatting option.

Questions about UUID Generator

Can I create more than one UUID at a time?

Yes. Choose a preset count or enter a custom count up to 100, then copy one UUID at a time or copy the whole newline-separated batch.

Which UUID version does this tool generate?

This page generates UUID v4 identifiers using browser crypto.randomUUID support. It does not create sortable UUID v7 IDs or deterministic namespace UUIDs.

Does UUID Generator require an account?

No. You can generate, format, and copy UUID values without signing in. Keep the tab open until every identifier you need has been copied.

When should I remove hyphens or use braces?

Use the standard hyphenated format unless a specific database column, SDK, log format, or GUID consumer expects compact IDs or braces.

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