UUID Generator
Generate random UUIDs (v4) instantly. Bulk generation, multiple formats. Cryptographically secure.
UUID Generator
94bfd8a2-56b6-4ab8-aa4a-93659d85d133 How to Use UUID Generator
- 1 Click "Generate" button to create a new random UUID
- 2 Click "Copy" to copy the UUID to your clipboard instantly
- 3 Select bulk count (5, 10, 25, 50, 100) for batch generation
- 4 Choose format: Standard, Uppercase, No Dashes, or With Braces
What You Get
A cryptographically secure UUID v4 generator using the Web Crypto API. Creates RFC 4122 compliant UUIDs suitable for databases, APIs, filenames, session tokens, and any system requiring unique identifiers. Supports bulk generation up to 100 UUIDs.
Input: Standard format
Output: 550e8400-e29b-41d4-a716-446655440000
Input: Uppercase format
Output: 550E8400-E29B-41D4-A716-446655440000
Input: No dashes format
Output: 550e8400e29b41d4a716446655440000
Input: With braces (GUID)
Output: {550e8400-e29b-41d4-a716-446655440000}
How do I generate a UUID online?
Click Generate. A cryptographically secure UUID v4 appears instantly. Click Copy to copy it to your clipboard.
What is the difference between UUID and GUID?
They are the same thing. UUID (Universally Unique Identifier) is the standard term. GUID (Globally Unique Identifier) is Microsoft terminology. Both refer to 128-bit identifiers.
Are generated UUIDs truly unique?
Practically yes. UUID v4 has 122 random bits. Collision probability is about 1 in 5.3×10³⁶ - astronomically unlikely even generating billions.
What is UUID version 4?
Version 4 UUIDs are randomly generated. Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where 4 indicates version 4 and y is 8, 9, a, or b.
Can I use these UUIDs in production databases?
Yes. Generated using crypto.randomUUID() which is cryptographically secure and RFC 4122 compliant. Suitable for any production use.
How do I generate multiple UUIDs at once?
Select bulk count (5, 10, 25, 50, or 100) before generating. All UUIDs appear in a list you can copy together.
What UUID formats are available?
Standard (lowercase with dashes), Uppercase, No Dashes (32 characters), and With Braces ({}) for GUID-style formatting.
What is the difference between UUID v1 and v4?
v1 uses timestamp and MAC address (can leak info). v4 is purely random (recommended). This tool generates v4 for privacy and security.
100% client-side. UUIDs generated using crypto.randomUUID() – nothing sent to any server.