UUID Studio
Generate, format, and export unique IDs.
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Online UUID Generator (v4) - Bulk & Custom Formats
Generate random Universally Unique Identifiers (UUID v4) instantly. Whether you need a single key for a database record or 1000 IDs for mock data seeding, our tool provides cryptographic security and customizable formatting options.
What is a UUID v4?
A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. Version 4 is randomly generated, meaning the probability of a duplicate is virtually zero (1 in 2.7 quintillion).
Common Use Cases
• **Database Keys:** Primary keys in NoSQL databases (MongoDB, Cassandra). • **Session IDs:** Tracking users without personal data. • **File Names:** Preventing overwrites in cloud storage. • **API Keys:** Generating secure tokens.
Formatting Options Explained
• **Standard:** 8-4-4-4-12 format (e.g., a0eebc99-9c0b...) • **No Hyphens:** Useful for optimizing storage size. • **Uppercase:** Often required by legacy systems. • **Braces/Quotes:** Ready for SQL queries or JSON objects.