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JSON 서식 지정, URL 인코딩, Base64 변환, HTML 엔티티 처리, UUID 생성을 브라우저에서 안전하게 처리하세요.

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UUID 생성기

RFC 4122 표준을 준수하는 v4 UUID를 브라우저에서 생성

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SPECIFICATION

RFC 4122 v4 UUID Generation

Features and customization options for unique identifier generation.

Bulk Generation

Generate up to 100 unique identifiers at once, separated cleanly line by line for database seeds, mock data, and test environments.

Case & Hyphen Options

Toggle between lowercase and uppercase characters, with or without hyphens, or wrapped in standard curly braces {...}.

Cryptographically Strong

Powered by native browser hardware-backed randomness (Web Crypto API) ensuring unmatched uniqueness and zero server logging.

FAQ

UUID Generator Questions

What is a Version 4 UUID?

A Version 4 Universally Unique Identifier (UUID) is a 128-bit label generated using cryptographically secure pseudorandom numbers. The probability of generating two identical v4 UUIDs is practically zero (1 in 2^122).

How are UUIDs generated in this tool?

This tool uses the browser's native Web Cryptography API via crypto.randomUUID(), providing high-entropy, cryptographically strong random bits directly on your device.

What is the difference between a UUID and a GUID?

GUID (Globally Unique Identifier) is Microsoft's implementation of the UUID standard. In practice, GUID and UUID are synonymous terms referring to 128-bit unique identifiers formatted as 8-4-4-4-12 hexadecimal digits.

Can I generate multiple UUIDs at once?

Yes. You can select to generate 1, 5, 10, 25, 50, or 100 UUIDs in a single click and copy or download them as a text file.