PDF Security Tools
Security tools control who can open a document and what it reveals. Add AES-256 password protection, remove a password you know, permanently black out sensitive content, or compare two versions to spot changes. Because files never leave your device, these tools are safe for confidential documents.
Protect PDF
Protect PDF adds a password to a PDF using AES-256 encryption, so it cannot be opened without the password. You can also block printing, copying, or editing. Encryption runs in your browser, so neither the file nor the password is sent anywhere.
Unlock PDF
Unlock PDF removes the password from a PDF you are allowed to open, and lifts printing and copying restrictions. Enter the current password, and download a copy that opens without it. Decryption runs in your browser and the file is never uploaded.
Redact PDF
Redact PDF permanently removes sensitive information such as names, account numbers, and signatures. Draw black boxes over the content, and the affected pages are rebuilt as images so the hidden text cannot be copied or recovered. Redaction runs in your browser.
Compare PDF
Compare PDF shows what changed between two versions of a document. See added and removed words highlighted page by page, or switch to a visual overlay that marks changed areas in red. Both files are compared in your browser and never uploaded.