UUID Generator

Online UUID v4 generator via browser crypto API for databases, tests, APIs, and correlation IDs.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

UUID Generator is a free online tool for creating random UUID v4 identifiers in the browser via crypto API. It is useful for database records, test data, request IDs, correlation IDs, and API integrations. Processing runs locally in your browser.

What it does

Output

Processing

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How to use

Specify how many UUIDs to generate.
Choose output format: line by line, comma-separated, JSON array, or SQL IN list.
Optionally enable uppercase, remove hyphens, or add a prefix.
Click Generate and copy UUIDs for a database, tests, API, request ID, or correlation ID.

More about this tool

UUID Generator creates random UUID v4 values in the browser via crypto API. UUIDs are convenient as record identifiers in databases, test entities, mock data, request IDs, correlation IDs, events, logs, and API integrations.

You can generate one or many UUIDs, output them line by line, comma-separated, as a JSON array or SQL IN list, and choose case, remove hyphens, or add a prefix.

Processing runs locally in your browser.

Generates UUID v4 via crypto API
Can create one or many UUIDs
Has formats for JSON and SQL
Can remove hyphens or change case
Suitable for databases, APIs, tests, and correlation IDs
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What is UUID v4?

UUID v4 is a random universal identifier often used for database records, test data, request IDs, correlation IDs, and API integrations.

How do I generate a UUID?

Specify the number of UUIDs, choose output format, and click "Generate". The result can be copied in one click.

Can I generate several UUIDs at once?

Yes. You can specify the count and get a list line by line, comma-separated, as a JSON array, or SQL IN list.

Which random generator is used?

The tool should use browser crypto API: crypto.randomUUID(), with a secure fallback to crypto.getRandomValues if needed. Math.random should not be used.

Can I remove hyphens from UUID?

Yes. You can enable a format without hyphens to get a compact 32-character string.

Is UUID suitable for databases?

Yes. UUID v4 is often used as record identifiers. Choosing UUID as a primary key depends on database architecture and project requirements.

Does UUID guarantee absolute uniqueness?

UUID v4 has an extremely low collision probability, but it is a random identifier, not a check against your database. Use a unique index for application-level guarantees.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.

More about this tool

You can generate one or many UUIDs, output them line by line, comma-separated, as a JSON array or SQL IN list, and choose case, remove hyphens, or add a prefix.

Processing runs locally in your browser.

Generates UUID v4 via crypto API
Can create one or many UUIDs
Has formats for JSON and SQL
Can remove hyphens or change case
Suitable for databases, APIs, tests, and correlation IDs
Runs in the browser
Data is not sent to the server
No registration required

Frequently Asked Questions

What is UUID v4?

UUID v4 is a random universal identifier often used for database records, test data, request IDs, correlation IDs, and API integrations.

How do I generate a UUID?

Specify the number of UUIDs, choose output format, and click "Generate". The result can be copied in one click.

Can I generate several UUIDs at once?

Yes. You can specify the count and get a list line by line, comma-separated, as a JSON array, or SQL IN list.

Which random generator is used?

The tool should use browser crypto API: crypto.randomUUID(), with a secure fallback to crypto.getRandomValues if needed. Math.random should not be used.

Can I remove hyphens from UUID?

Yes. You can enable a format without hyphens to get a compact 32-character string.

Is UUID suitable for databases?

Yes. UUID v4 is often used as record identifiers. Choosing UUID as a primary key depends on database architecture and project requirements.

Does UUID guarantee absolute uniqueness?

UUID v4 has an extremely low collision probability, but it is a random identifier, not a check against your database. Use a unique index for application-level guarantees.

Is my data sent to the server?

No. Processing runs locally in your browser and data is not sent to the server.

Do I need to register?

No. The tool works without registration.