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Man Of Rome

Sigillum

Hash Generator

Seal your data. Detect tampering.

Compute cryptographic hashes for text strings or files using the Web Crypto API. Useful for checksums, integrity verification, and API signatures.

A sigillum sealed a letter — break the wax and you know the message was tampered with. Hashes work the same way for data.

Related tools

How to use

  1. Choose text or file input and select an algorithm (SHA-256, SHA-384, SHA-512).
  2. Enter text or select a file.
  3. Click Generate hash and copy the result.

FAQ

Is my file uploaded?
No. Hashing uses crypto.subtle.digest() entirely in your browser.
Can I verify a file integrity?
Yes. Hash the file here and compare the output to a known-good hash from the source.
Why no MD5?
MD5 is deprecated for security. We offer SHA-256 and stronger algorithms supported natively by browsers.