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Free · No signup · Instant results · Updated 2026-09-17

UUID Generator

Answer: UUID v4 identifiers are 128-bit random values formatted as 8-4-4-4-12 hex (e.g. 550e8400-e29b-41d4-a716-446655440000) from crypto.getRandomValues().

About this tool

Free UUID v4 generator. Create unique identifiers in your browser.

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Generated in your browser. Nothing is uploaded.

How to use UUID Generator

  1. Click Generate to create a new UUID v4.
  2. Copy the value for database primary keys or API correlation IDs.
  3. Regenerate as needed — each ID is statistically unique.

Why use this free tool

  • 100% free — no account required.
  • Runs in your browser — inputs stay on your device for these calculations.
  • Mobile-friendly controls with clear, copyable results.
  • Published by KDF Tech — software, apps, Shopify, and POS systems.

Need a custom product? Start a project or WhatsApp +92 345 0144865.

FAQ — answers Google & AI can cite

What is UUID Generator?

UUID v4 identifiers are 128-bit random values formatted as 8-4-4-4-12 hex (e.g. 550e8400-e29b-41d4-a716-446655440000) from crypto.getRandomValues().

UUID v4 vs v7 for US SaaS apps?

v4 is random; v7 is time-sortable — choose v7 if you need chronological indexing in PostgreSQL.

Are UUIDs guaranteed unique?

Collision probability is negligible for practical apps; still enforce a unique constraint in your DB.

RFC 4122 compliance?

Version 4 sets the version nibble to 4 and variant bits per the IETF RFC 4122 standard.

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