Share this link via:
WhatsAppFacebookTwitter

UUID Generator

Generate universally unique identifiers (UUID v4) instantly. Bulk generate up to 1000 UUIDs with custom formatting.

UUID Generator

Generate universally unique identifiers (UUID v4) instantly. Bulk generate up to 1000 UUIDs with custom formatting.

UUID v4

How much did you enjoy UUID Generator?

Related Tools

No data found – try searching with different keywords or check back later

Not Found

What is a UUID?

A UUID (Universally Unique Identifier), also called GUID, is a 128-bit identifier guaranteed to be unique across time and space. UUID v4 uses random numbers to generate identifiers with an astronomically low probability of collision, making them ideal for database primary keys, session tokens, and distributed system IDs.

Key Features

  • Generate 1 to 1000 UUID v4s at once
  • Uppercase or lowercase output
  • Toggle hyphens on or off
  • Wrap UUIDs in curly braces {} or quotes ""
  • Copy all UUIDs to clipboard or download as .txt
  • Generation history with restore function
  • 100% browser-based using crypto.randomUUID()

UUID v4 Format

A standard UUID v4 looks like: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where x is a random hexadecimal digit and 4 indicates version 4. The y digit is constrained to 8, 9, a, or b to indicate the variant.

How to Use

  1. Set the number of UUIDs to generate (1–1000).
  2. Choose formatting options: case, hyphens, braces, quotes.
  3. Click 'Generate UUIDs'.
  4. Copy all UUIDs or download them as a text file.
UUID Generator - Free Online UUID v4 Generator | ToolSnak

Got Questions? We have you covered

UUID v4 uses cryptographically secure random numbers (crypto.randomUUID or crypto.getRandomValues). The probability of generating two identical UUIDs is approximately 1 in 5.3 × 10^36 — effectively impossible in practice.

They are the same thing. GUID (Globally Unique Identifier) is Microsoft's term for the same 128-bit identifier standard defined by RFC 4122.

Yes. UUID v4 is widely used as a primary key in distributed databases (PostgreSQL, MySQL, MongoDB) because it avoids sequential ID collisions when merging data from multiple sources.

Yes. The tool uses the browser's crypto.randomUUID() API (or crypto.getRandomValues fallback), which is a cryptographically secure random number generator.

Support ToolSnak’s Mission

ToolSnak is completely free — no sign-ups, no limits. Enjoy AI writing tools, OCR, and more with zero hassle. Want to help us grow? We love your support. Thank you!

Support ToolSnak’s mission with a donation — teamwork and coffee-powered tools
UUID Generator - Free Online UUID v4 Generator | ToolSnak