UUID Generator
Generate UUID v4/v7 identifiers online, supports batch generation
Overview
Our online UUID generator supports both v4 random generation and v7 time-ordered generation to meet different use cases. Generate up to 100 UUIDs at once with formatting options like uppercase and hyphen removal. UUID v7 is timestamp-based and sortable, making it ideal for database primary keys and other scenarios requiring ordered identifiers.
Features
- UUID v4 random generation
- UUID v7 time-ordered generation
- Batch generate up to 100 UUIDs
- Uppercase/lowercase output toggle
- Hyphen removal option
- One-click copy single or all UUIDs
- UUID format validation
How It Works
- Choose UUID version: v4 (fully random) or v7 (time-ordered)
- Set the count and format options (uppercase, hyphen removal)
- Click generate to create UUIDs in the browser
- Copy individual UUIDs or use the copy-all button for batch retrieval
Tips
- Choose UUID v7 when you need time-ordered identifiers, such as database primary keys or log indexing
- Use the copy-all button after batch generation for easy import into databases or config files
- Hyphen-free format (32 characters) is ideal for length-sensitive scenarios like short URL generation
FAQ
What is the difference between UUID v4 and v7?
UUID v4 is fully random, suitable for general-purpose unique identifiers. UUID v7 is timestamp-based with time-ordering properties, ideal for database primary keys or scenarios requiring sequential identifiers. v7 is a newer standard (RFC 9562) that combines uniqueness with orderability.
Can generated UUIDs ever repeat?
UUID v4 has an astronomically low collision probability (approximately 2^122 possible combinations), making duplicates practically impossible in real-world use. UUID v7 combines a timestamp with random suffixes, providing equally strong uniqueness guarantees.
What is the difference between UUID and GUID?
UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are technically the same — both are 128-bit unique identifiers. GUID is Microsoft's naming convention, while UUID is the universal standard. They are interchangeable.