Protect PDF
Secure your sensitive documents with a custom password. Lock your PDF to prevent unauthorized opening, copying, or printing maliciously.
Bulletproof Document Hashing
Upload File
Select the PDF you want to protect. The file is read directly into your browser's secure local memory.
Create Password
Design a secure decryption key. Make sure you don't forget it, as we cannot bypass it once the mathematical lock is set.
Save Encrypted
Our simulation engine writes the locked file to your disk. Users will now be prompted before viewing contents.
Why trust PDFsHero for document protection?
Unmatched Privacy
Unlike traditional cloud converters, we use WebAssembly to process files directly on your machine. Your private documents are never sent across the internet to external servers.
Zero Latency
Because there is no upload process, your files are processed instantly the moment you hit the button. Experience the power of desktop software right in your browser tab.