Local utility
File Hash Calculator
Calculate SHA-256, SHA-384 and SHA-512 in your browser. The file, filename, size and hashes are never uploaded or included in analytics events.
Select a local file
No file selected.
- File size
- SHA-256
- SHA-384
- SHA-512
What this result means
Matching hashes are strong evidence that two byte sequences are identical under the selected algorithm. A hash does not identify who created a file, certify its source, or prove that it is safe to open.
Private, bounded browser processing
Web Crypto accepts an ArrayBuffer, so this implementation reads bytes rather than building a large text string. To avoid excessive browser memory use, files larger than 512 MiB are declined. For very large files, use a trusted streaming command-line hashing tool.