UUID Generator

Generate UUID v4/v7, bulk output, and validate UUIDs

100% In-BrowserNo Server UploadFree, No Signup
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How to Use

  1. Choose Generate or Validate

    Use the toolbar to switch between generation and validation.

  2. Set options and run

    For generation, pick version (v4/v7), count, format, and output type, then click "Generate". For validation, paste UUIDs and click "Validate".

  3. Copy result

    Use the "Copy" button to copy the generated UUIDs to your clipboard.

UUID Generator Examples

Bulk generate UUIDs (example: 3)

Input
3
Output
550e8400-e29b-41d4-a716-446655440000
c56a4180-65aa-42ec-a945-5fd21dec0538
f47ac10b-58cc-4372-a567-0e02b2c3d479

You can choose v4/v7, output style (lines/CSV/JSON), and formatting options.

Validate UUIDs

Input
550e8400-e29b-41d4-a716-446655440000
not-a-uuid
Output
status	info	uuid
Total: 2  OK: 1  NG: 1
OK	v4	550e8400-e29b-41d4-a716-446655440000
NG	format	not-a-uuid

Validation mode supports multiple UUIDs (one per line).

Features

  • UUID v4/v7 generation (bulk)
  • Output formats (lines/CSV/JSON) and formatting options
  • UUID validation with version/variant checks
  • Local processing (your input is not sent to servers)
  • Dark mode support

FAQ

What is a UUID?

UUID (Universally Unique Identifier) is a 128-bit unique identifier. It is widely used for database primary keys, distributed system IDs, API tokens, and other scenarios requiring non-colliding identifiers.

Can UUID v4 collide?

UUID v4 has 122 bits of randomness, making collision extremely unlikely. Even generating 1 billion UUIDs per second, it would take about 85 years to reach a 50% collision probability.

Is my data sent to a server?

No. UUID generation uses the browser's crypto.randomUUID() API. No data is ever transmitted externally.