UUID & Hash Generator
UUID & Hash Generator – Online SHA & UUID v4/v7 Tool
About UUID & Hash Generator
A UUID & Hash Generator outputs random UUID identifiers and calculates secure cryptographic hashes (SHA-1, SHA-256, SHA-384, SHA-512) for text payloads.
How It Works
The tool pulls random bytes using window.crypto CSPRNG for secure UUIDs and runs SubtleCrypto hashing algorithms inside a fast Web Worker thread.
How to Use UUID & Hash Generator
- Choose to generate UUIDs or compute cryptographic text hashes.
- Configure options (e.g. UUID version 4 or 7, number of items to generate).
- For hashes, enter your text payload in the input pane.
- Generate and click Copy to capture the resulting hashes or IDs.
FAQ
Are these UUIDs cryptographically secure?
Yes. They are drawn from `crypto.getRandomValues`, the browser's CSPRNG. v7 mixes 48 bits of millisecond timestamp with 74 bits of randomness — collision risk remains astronomically low.
Why no MD5?
WebCrypto deliberately omits MD5 because it is cryptographically broken. Use SHA-256 unless you have a legacy interop need.
Under the hood
UUIDs are assembled byte-by-byte from `crypto.getRandomValues`. Hashes use `crypto.subtle.digest` and are formatted as lower-case hex via a precomputed nibble table.
Engineered by HaorGrix