Hash generator
MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any input. SHA-* through the native Web Crypto API, MD5 through a small pure-JS implementation. Your input never leaves the browser.
ⓘ Cette entrée est rédigée en anglais par les développeurs.
/tools/hash computes a cryptographic digest of any text input. Pick the algorithm, paste your input, copy the hex output.
SHA-256, SHA-384 and SHA-512 go through crypto.subtle.digest, the native Web Crypto API — fast, audited, and FIPS-aligned. SHA-1 is wired through the same API but flagged with a “legacy / avoid for security” banner. MD5 is computed locally in a small pure-JS implementation (RFC 1321, ~70 lines) because Web Crypto deliberately doesn’t expose it; the banner reminds you it’s broken cryptographically and should only be used for checksum verification.
The input is hashed in the page on every keystroke. Nothing is sent to api.ferrlens.com — the standard FerrLens privacy guarantee applies here too. The share link encodes input and algorithm in the URL fragment so a colleague can land on the exact same view.