UUID & Hash Generator

Generate unique IDs and checksums with your browser's secure random number generator.

UUID generator

How many

Uppercase No hyphens Braces

Inspect a UUID

Hash generator

Hash a file HMAC

Hashing text input.

MD5

SHA-1

SHA-256

SHA-384

SHA-512

Which one should I use?

Use UUID v7 for database keys, since IDs created later sort later and keep indexes fast, and UUID v4 when an ID must not reveal when it was made. For checksums and signatures use SHA-256; MD5 and SHA-1 are only suitable for non-security checks such as matching a download against a published checksum. Never use a plain hash to store passwords. Read the full guide for details.