Generate and Validate UUIDs (v1, v3, v4, v5). Bulk Generation, Multiple Formats, and Detailed Analysis. Perfect for Developers.
Cryptographically random UUIDs • General purpose, most common
Example: f47ac10b-58cc-4372-a567-0e02b2c3d479
Use the options above to customize UUID generation
Choose from UUID v1 (timestamp-based), v3 (MD5 namespace), v4 (random), v5 (SHA-1 namespace), or nil UUID depending on your requirements.
Generate a single UUID for quick use or bulk-generate up to 1,000 UUIDs at once for database seeding, test fixtures, or migration scripts.
Pick standard hyphenated format, no-hyphens, uppercase, braces-wrapped (Microsoft GUID style), or C struct format to match your project requirements.
Copy individual UUIDs with one click, or copy the entire batch as a newline-separated list ready to paste into your code, SQL inserts, or CSV files.
Generate v1 (timestamp), v3 (MD5 namespace), v4 (cryptographically random), v5 (SHA-1 namespace), and nil UUIDs to suit different architectural needs.
Create up to 1,000 UUIDs in a single batch, perfect for populating test databases, generating fixture data, or scripting migrations.
Output UUIDs in standard, no-hyphens, uppercase, braces (GUID), or C struct format without manual string manipulation.
Paste any UUID to validate its format, detect the version, and extract embedded information like the timestamp from v1 UUIDs.
V4 UUIDs use the Web Crypto API for true cryptographic randomness, ensuring collision resistance suitable for production systems.
UUIDs are the standard for generating unique identifiers in distributed systems where auto-incrementing integers are impractical. Microservices, event-driven architectures, and multi-region databases all rely on UUIDs to avoid ID collisions without central coordination. This tool lets you generate production-quality UUIDs instantly without writing code or installing libraries.
During development, you frequently need sample UUIDs for API testing, mock data, database seeds, and documentation examples. Bulk generation saves time when you need hundreds of unique IDs for load testing or fixture files. The validation feature is equally useful for debugging—paste a UUID from a log or error message to confirm its version, format, and embedded metadata.
Choosing the right UUID version matters. Use v4 for general-purpose random IDs, v1 when you need time-ordered identifiers for chronological sorting, and v5 when you need deterministic IDs derived from a namespace and input string (such as generating consistent IDs from URLs or email addresses).
UUID v1 combines a timestamp with a node identifier (typically a MAC address), producing time-ordered IDs. UUID v4 is generated from cryptographic random numbers with no embedded information. V4 is the most common choice for general-purpose unique identifiers because it has no privacy concerns from embedded hardware addresses.
V4 UUIDs contain 122 bits of randomness generated via the Web Crypto API. The probability of a collision is astronomically low—you would need to generate about 2.7 quintillion UUIDs to have a 50% chance of a single duplicate. They are safe for production use in databases and distributed systems.
Yes. Paste any UUID into the validation panel to check its format, detect the version (v1 through v5), and view embedded data. For v1 UUIDs, the tool extracts and displays the encoded timestamp and node identifier.
UUID v5 generates a deterministic ID from a namespace UUID and an input string using SHA-1 hashing. This means the same namespace plus the same input always produces the same UUID. It is useful for creating consistent identifiers from URLs, domain names, or email addresses across distributed systems.
No. All UUID generation and validation runs entirely in your browser using JavaScript and the Web Crypto API. Nothing is sent to a server, so the tool is safe to use in environments with strict data handling policies.
Format and validate JSON data that often contains UUID fields as record identifiers.
Encode UUIDs to Base64 for compact representation in URLs and tokens.
Convert timestamps embedded in v1 UUIDs or correlate UUID creation times with Unix epoch values.
Generate cryptographically secure passwords alongside your UUIDs for complete test account setup.