TL;DR: Upload a PDF, instantly shred it from our servers, and receive a tamper-proof HMAC-SHA256 signed deletion certificate. Verify your file was truly destroyed.
Secure Upload & Certified Delete
Upload a PDF, we instantly shred it from our servers and hand you an HMAC‑SHA256 signed deletion certificate — tamper‑proof cryptographic evidence that your file was truly destroyed.
Maximum 100 MB · PDF files only
Your file is immediately fingerprinted (SHA-256 hash), its metadata extracted (page count, size), and then securely destroyed using a 3-pass overwrite method (zeros → random bytes → zeros → unlink). The entire process takes seconds and nothing is retained.
It's a digitally signed JSON document that proves PDFTeq received your file and destroyed it at a specific timestamp. It contains the file's SHA-256 hash, metadata, and an HMAC-SHA256 signature that anyone can verify using our verification tool.
Paste the certificate JSON or the certificate ID into the "Verify a Deletion Certificate" section above. Our server re-computes the HMAC signature and confirms whether it matches, proving the certificate was genuinely issued by PDFTeq and hasn't been tampered with.
No. The file exists in a temporary sandbox only for the few seconds it takes to hash and extract metadata. It is never copied, backed up, or sent to any third party. The 3-pass secure overwrite ensures the data cannot be recovered from disk.
HMAC-SHA256 is a cryptographic message authentication code. PDFTeq signs every deletion certificate with a secret key. If anyone modifies even a single character of the certificate, the signature check will fail — proving the certificate is original and unaltered.