Web Crypto API • Nothing Ever Leaves Your Device
SHA Hash Generator & UUID Creator
Compute SHA-1, SHA-256, SHA-384, and SHA-512 digests from any text, and mint bulk UUID v4 identifiers — all with your machine's own cryptographic engine.
Text → SHA Digest
16 characters
Digest appears here as you type…
UUID v4 Generator
0 Identifiers
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SHA Family at a Glance
| Algorithm | Digest Size | Hex Length | Status |
|---|---|---|---|
| SHA-1 | 160-bit | 40 chars | Broken — legacy only |
| SHA-256 | 256-bit | 64 chars | Recommended default |
| SHA-384 | 384-bit | 96 chars | Strong, TLS common |
| SHA-512 | 512-bit | 128 chars | Strongest, fast on 64-bit |
Anatomy of a UUID v4
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
- 4 — the version nibble, always fixed for v4 (random).
- y — the variant nibble, constrained to 8, 9, A, or B.
- All other characters are cryptographically random hex — 122 random bits in total.
- Need many at once? Set the count dropdown, hit Generate, then Copy all to paste straight into a seed file or test fixture.
Frequently Asked Questions
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