Generate UUIDs for Database Primary Keys

Create UUID v4 values to use as primary keys in PostgreSQL, MySQL, MongoDB, and other databases.

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Click Generate to create UUIDs

UUID v4 uses 122 random bits — the chance of a collision between two UUIDs is astronomically small.

Generated with crypto.getRandomValues — cryptographically secure, never sent to a server.

Databases tips

🗄️

UUIDs as primary keys allow records to be created across distributed systems without coordination — no auto-increment collisions between servers.

💡

PostgreSQL has a native UUID type. Use uuid_generate_v4() server-side, or generate here and insert via parameterised query.

🔢

MongoDB uses its own ObjectID format, but also accepts UUIDs as string _id values. Generate here and use as a custom identifier.

📦

Generate 10–50 UUIDs at once for bulk data seeding or test fixture files. Copy all to paste directly into your SQL INSERT statements.

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The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

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Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Completamente gratis — sin costes ocultos, nunca

✓Sin cuenta, correo ni registro requerido

✓Los archivos nunca salen de tu dispositivo

✓Sin límite de tamaño de archivo en absoluto

✓Sin marcas de agua en ningún resultado

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