Explosion Tools

UUID Generator

Generate random UUID v4 identifiers. Free, no signup, works in your browser.

Generated using crypto.randomUUID() in your browser. No data is sent to any server.

About UUID Generator

This tool generates version 4 UUIDs (Universally Unique Identifiers) using the cryptographically secure crypto.randomUUID() API. Generate a single UUID or bulk generate up to 100 at once. Options include uppercase formatting and removing dashes for compact identifiers. UUIDs are 128-bit identifiers that are guaranteed to be unique across space and time, making them ideal for database primary keys, distributed systems, session tokens, and API request tracking.

Frequently Asked Questions

What is a UUID v4?
UUID v4 (version 4) is a 128-bit identifier generated from random or pseudo-random numbers. The format is 8-4-4-4-12 hexadecimal digits, like 550e8400-e29b-41d4-a716-446655440000. The version is indicated by the '4' in the third group.
Are these UUIDs truly unique?
Practically, yes. UUID v4 has 122 random bits, giving 5.3 × 10³⁶ possible values. The probability of generating a duplicate is vanishingly small — you'd need to generate 1 billion UUIDs per second for 85 years to have a 50% chance of one collision.
What is the difference between UUID and GUID?
They are the same thing. UUID (Universally Unique Identifier) is the standard name from RFC 4122. GUID (Globally Unique Identifier) is Microsoft's term for the same concept. Both refer to 128-bit identifiers in the same format.

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