Vendor PDFs, legacy bank statements, and downloaded textbooks often ship with owner locks that block copying quotes into research notes or merging exhibits into a court filing. Unlock restores permissions when you supply the authorized password.

Siliph Unlock PDF processes decryption in the browser-backed pipeline with encrypted uploads. The tool does not crack unknown passwords—it only removes restrictions you are entitled to lift with credentials you already possess.

After unlocking, merge chapters, run OCR on scans, or convert sections to Word without hitting "permission denied" dialogs. Save a new copy so the unrestricted file replaces the locked original in your workflow.

Auto-deletion within two hours on the free tier protects decrypted content on shared machines. No signup is required for legitimate unlock jobs on documents you own or administer.

Re-apply Protect PDF with a fresh password before sending the edited file externally, especially after redacting confidential lines.

Siliph security tools—password protection, unlocking, redaction, and watermarks—process inside an encrypted browser session so sensitive PDFs stay protected in transit. We delete your files within two hours on the free tier and never gate basic protection behind signup.