Verify a PDF locally
Select the PDF document you received from HEXIMS. We'll compute its SHA-256 hash locally in your browser and compare it against our records to detect tampering. Your PDF never leaves your device.
How browser-local hash verification works
- • We compute the SHA-256 hash of your PDF locally in your browser
- • Only the hash (not the PDF) is sent to our server for comparison
- • We compare it against the hash stored when the document was originally issued
- • Even a single-byte change (editing text, adding a signature) will result in a different hash
- • Matching means your PDF is byte-for-byte identical to the original
- • Not matching means your PDF has been modified
- • Your PDF never leaves your device - this is browser-local verification