Toolstack
RFC 4122 & RFC 9562 Compliant

Online UUID Generator

Generate cryptographically random UUID v4 and sortable UUID v7 identifiers with bulk export and format controls.

e4091386-95fc-4b94-a216-64e92a783f8d
cc519499-e766-4b86-b052-8c89bcf6ceeb
1b9248ad-07de-409d-9fd5-0c93ef262975
0cf4f8ee-f247-4fa0-a2a3-bcf00aedafe6
950a3b63-5671-40ba-8cdb-c70b79d647b5

UUID Validator & Inspector

Your Base64 data stays in your browser. Client-side only

Understanding UUIDs: Why UUID v7 is the Modern Standard

A UUID (Universally Unique Identifier) or GUID is a 128-bit value designed to ensure global uniqueness across distributed systems without requiring database synchronization. Formatted as 32 hexadecimal digits separated into five hyphens (e.g., 123e4567-e89b-12d3-a456-426614174000).

v4

UUID v4 (Random)

Generated from 122 pseudo-random bits. The most popular choice for distributed API tokens and unique references.

v7

UUID v7 (Time-Ordered)

Defined in RFC 9562, v7 embeds a 48-bit Unix timestamp. Drastically reduces B-tree fragmentation in PostgreSQL & MySQL.

v1

UUID v1 (Gregorian)

Based on system clock and network node IDs. Still widely used in legacy enterprise applications.

Step-by-Step: How to Generate & Validate UUIDs

  1. Select your target UUID version: v4 for pure randomness, or v7 for chronological database primary keys.
  2. Choose quantity from 1 to 100 bulk identifiers.
  3. Adjust formatting toggles: with or without hyphens, lowercase or uppercase.
  4. Copy individual identifiers or click Copy All / Download (.txt).
  5. Use the built-in UUID Validator below the tool to verify format and extract timestamp metadata from existing identifiers.

Zero-Server Security Guarantee

Unlike remote tools that log API keys or IDs, our UUID generator runs entirely in your local browser using the Web Crypto API. No data is stored, cached, or transmitted over the wire.

Frequently Asked Questions

Clear, concise answers to common questions about Base64 decoding, encoding, and specifications.

A UUID (Universally Unique Identifier) or GUID is a 128-bit label used in computer systems to uniquely identify information without requiring a central coordination authority. With 3.4 × 10^38 possible combinations, collision probability is virtually zero.

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