Free online tool

UUID Generator

Create standards-shaped random identifiers locally with bulk output.

Method

Technical calculation method

The tool uses deterministic browser APIs and standard numeric or data-format rules. Inputs and outputs remain visible so addresses, dimensions, codes, and serialized data can be checked directly.

Network and hardware results follow the selected CIDR, band, pixel, or format values; verify production settings against the target system specification.

Questions

UUID Generator FAQ

What is a UUID v4?

It is a 128-bit identifier whose random bits are formatted in the standard 8-4-4-4-12 hexadecimal pattern with version and variant markers.

Can two generated UUIDs collide?

A collision is theoretically possible but extraordinarily unlikely when a cryptographically secure random generator is used.

Related tools

Continue calculating

All calculators
Color ConverterConvert and preview HEX, RGB, and HSL color values with contrast checks.Text Encoding ConverterEncode or decode Base64, URL percent encoding, and HTML entities in the browser.Roman Numeral ConverterConvert standard Roman numerals and decimal integers from 1 through 3,999.URL ParserParse a complete URL into protocol, host, port, path, query parameters, hash, origin, username, and password fields.JWT DecoderDecode a JSON Web Token header and payload locally, display timestamps, and inspect claims without transmitting the token.Password GeneratorGenerate cryptographically random passwords with custom length, character groups, ambiguous-character controls, and strength estimates.