AnyUUID.com

AnyUUID.com is a modern web application designed to generate various types of identifiers and strings for development and testing purposes. All generators use cryptographically secure random numbers to ensure high-quality, unpredictable results.

UUID Generators

UUID v4 Structure

xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx

Where:
x = random hexadecimal digit (0-9 or a-f)
4 = version number
y = one of: 8, 9, A, or B

Time Low8 charsxxxxxxxx

Time Mid4 charsxxxx

Version4 chars4xxx

Variant4 charsyxxx

Node12 charsxxxxxxxxxxxx

Version 4 UUIDs use random or pseudo-random numbers to ensure uniqueness. The probability of a collision (two identical UUIDs) is so low that it can be safely ignored in most applications. With 122 random bits, the probability of creating a duplicate UUID is about 1 in 5.3×10³⁹.

UUID v5 Structure

xxxxxxxx-xxxx-5xxx-yxxx-xxxxxxxxxxxx

Where:
x = SHA-1 hash derived hexadecimal digit
5 = version number
y = one of: 8, 9, A, or B

Time Low8 charsxxxxxxxx

Time Mid4 charsxxxx

Version4 chars5xxx

Variant4 charsyxxx

Node12 charsxxxxxxxxxxxx

Version 5 UUIDs use SHA-1 hashing of a namespace UUID and a name to generate deterministic identifiers. Unlike v4 UUIDs which are random, v5 UUIDs will always generate the same identifier for the same namespace and name combination. This makes them ideal for scenarios where you need reproducible unique identifiers.

Standard Namespaces

DNS: 6ba7b810-9dad-11d1-80b4-00c04fd430c8
URL: 6ba7b811-9dad-11d1-80b4-00c04fd430c8
OID: 6ba7b812-9dad-11d1-80b4-00c04fd430c8
X.500 DN: 6ba7b814-9dad-11d1-80b4-00c04fd430c8

String Generators

Random Strings

Generate random strings of various lengths (16-256 characters) using a combination of uppercase letters, lowercase letters, and numbers. These are perfect for:

API Keys (16-32 characters)
Session Tokens (32-48 characters)
Access Tokens (48-64 characters)
Security Keys (128-256 characters)

Hex Strings

Generate random hexadecimal strings using characters 0-9 and a-f. Available in lengths of:

32 characters: Suitable for hash-based identifiers
64 characters: Perfect for cryptographic hashes

Secure Passwords

Generate cryptographically secure passwords with various options:

12 characters: Minimum recommended length for high security
16 characters: Enhanced security for sensitive accounts
24 characters: Maximum security for critical systems

Passwords can include lowercase letters, uppercase letters, numbers, and special characters to meet various password requirements.

Hash Functions

SHA-256

SHA-256 is a cryptographic hash function that produces a 256-bit (32-byte) hash value, typically rendered as a 64-digit hexadecimal number. It's widely used in security applications and is considered cryptographically secure.

SHA-512

SHA-512 provides even stronger security with a 512-bit (64-byte) hash value, rendered as a 128-digit hexadecimal number. It's ideal for applications requiring maximum security, though it's computationally more intensive than SHA-256.

MD5 (Legacy)

MD5 is a legacy hash function that produces a 128-bit (16-byte) hash value. While it's still used in some non-security applications for checksums, it's not considered cryptographically secure and should not be used for passwords or security purposes.

Security & Privacy

All generation happens directly in your browser using the Web Crypto API for secure random number generation. No data is sent to our servers, and no information is stored or tracked. The application is completely static and can even work offline once loaded.

Open Source

AnyUUID.com is open source and available on GitHub. We welcome contributions and feedback from the community.

About AnyUUID