Password Protect PDF
Password-protect PDFs with AES-256 locally, no upload, no sign-in.
Processing and data safety
Section titled “Processing and data safety”This tool runs entirely in your browser — your files are never uploaded to a server.
Input and output
Section titled “Input and output”- Formats: PDF
- Flow: PDF → AES-256 encrypted PDF
How to use
Section titled “How to use”- Drop in a PDF (multiple files run as a batch with the same passwords).
- Set the open password twice to confirm it (owner password optional), and pick the reader permissions: print / copy / modify / comments.
- Click Encrypt & Download — the encrypted file is generated locally.
Key details and limits
Section titled “Key details and limits”- Encrypted inputs must be decrypted first; already-encrypted PDFs are rejected.
- The open password is required and confirmed twice — a typo would produce a file you cannot open. Permissions (print/copy/modify/comments) are adjustable and apply to every file in a batch; flags are advisory and some readers may ignore them.
- Very large files depend on your device memory — desktop software recommended.
Common use cases
Section titled “Common use cases”- Drop in a PDF → set open/permission passwords → download the encrypted PDF