What UUID version does this tool generate?

The tool generates version 4 UUIDs (random UUIDs) using your browser's crypto.randomUUID() API when available. These are suitable for database keys, request IDs, and session identifiers.

Can I generate many UUIDs at once?

Yes. Choose a quantity from 1 up to 100 and click Generate. Each identifier appears on its own line so you can copy or download the block easily.

What do the uppercase and hyphen options do?

Uppercase converts letters A–F to capitals. Removing hyphens outputs a continuous 32-character hex string, which some systems prefer over the standard 8-4-4-4-12 format.

Is data sent to your servers?

No. UUIDs are created entirely in your browser. Nothing is uploaded or stored on our infrastructure.

UUID-Generator

UUID v4 stapelweise erzeugen, kopierfreundlich

Quantity

UppercaseWith hyphens

Output

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Generate UUID v4 values for keys, IDs, and tests

UUID v4 is the standard for unique identifiers when you don't want a centralized counter — primary keys, request IDs, idempotency tokens, session identifiers. Generating them in the browser uses the native crypto API for proper randomness, with options to format with or without hyphens and uppercase or lowercase to match your storage conventions.

Use the generator when you need to

Mint database primary keys

Generate UUIDs for new records so your IDs stay unique across services without a central counter.

Create idempotency or request IDs

Tag every API request with a UUID so retries are safe and traces are easy to correlate.

Bulk-generate IDs for tests or seed data

Produce dozens of IDs at once for fixtures, mock data, or sample database rows.

How to generate UUIDs quickly

1
Set the quantity (1 to 100) and choose hyphenation and case options.
2
Click Generate to produce UUID v4 values using the browser's secure random source.
3
Copy the list or download a text file for use in code or fixtures.

Keep going

Hash text or files

Generate SHA-256/384/512 digests when you need a deterministic identifier instead of random.

Convert Unix timestamps

Pair generated IDs with timestamps when you need ordered, traceable records.

Decode tokens

Inspect the JTI and other claims when troubleshooting auth tokens.

Generate full mock records

Build realistic test records that include UUIDs alongside names and emails.

Common UUID workflows

Bootstrap a new schema

Generate a batch of UUIDs to seed primary keys when bringing up a new database table.

Reproduce a bug with consistent IDs

Use the same generated UUIDs across runs to make a flaky test deterministic.

Mint webhook idempotency keys

Generate stable IDs for webhook delivery so retries don't double-process events.

Häufig gestellte Fragen

Das Tool erzeugt UUIDs der Version 4 (random UUIDs) und nutzt dafür, wenn verfügbar, die crypto.randomUUID()-API deines Browsers. Das eignet sich z. B. für Datenbank-Keys, Request-IDs und Session-Identifier.

Ja. Wähle eine Anzahl von 1 bis 100 und klicke auf Generate. Jede UUID steht in einer eigenen Zeile, damit du den Block leicht kopieren oder herunterladen kannst.

Uppercase wandelt die Buchstaben A–F in Großbuchstaben um. Remove hyphens gibt eine durchgehende 32-stellige Hex-Zeichenkette aus, die manche Systeme gegenüber dem Standardformat 8-4-4-4-12 bevorzugen.

Nein. UUIDs werden vollständig in deinem Browser erzeugt. Es wird nichts hochgeladen oder auf unserer Infrastruktur gespeichert.