UUID Generator
Generate UUID v4 identifiers instantly in your browser. Bulk generate up to 50, customise format, and copy all with a single click. No signup required.
Generated UUIDs(0 UUIDs)
v4Click Generate to create UUIDs
Format Preview
Standard (with hyphens)
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxxNo hyphens (32 chars)
xxxxxxxxxxxx4xxxyxxxxxxxxxxxxxxxHow to Use the UUID Generator
Select Quantity
Choose how many UUIDs to generate: 1, 5, 10, 25 or 50 at once.
Choose Format
Select with or without hyphens, and uppercase or lowercase output.
Click Generate
Hit the Generate button to create fresh UUID v4 identifiers instantly.
Copy & Use
Copy individual UUIDs or click Copy All to grab the entire list at once.
Frequently Asked Questions
What is a UUID?
UUID stands for Universally Unique Identifier. It is a 128-bit label used to uniquely identify objects in computer systems. The standard format is 32 hexadecimal characters displayed in 5 groups separated by hyphens: 8-4-4-4-12.
What is UUID version 4?
UUID v4 is generated using random or pseudo-random numbers. Apart from two specific bits that identify the version, all other bits are randomly generated. This makes the probability of two identical UUIDs being generated essentially zero — there are 2^122 possible values.
Is it safe to use these UUIDs in production?
Yes. This tool uses the browser's built-in crypto.randomUUID() API, which is cryptographically secure. The generated UUIDs are suitable for use as database primary keys, session tokens, file names and any other use case requiring globally unique identifiers.
What is the difference between UUID with and without hyphens?
Both represent the same identifier. The hyphenated form (e.g., 550e8400-e29b-41d4-a716-446655440000) is the standard RFC 4122 format and is more readable. The no-hyphens form (e.g., 550e8400e29b41d4a716446655440000) is a 32-character hex string, useful in systems where hyphens are not allowed.
Can I generate UUIDs offline?
Yes — all generation happens entirely in your browser with no server round-trips. The page will generate UUIDs even without an internet connection once it has been loaded.