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Protect PDF
Add password protection to your PDF — encrypted entirely in your browser. Your password never leaves your device.
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Drop PDF files here
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🔒 Your files stay on your device
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Add password protection to your PDF — encrypted entirely in your browser. Your password never leaves your device.
Select the document you want to password-protect.
Enter a strong password. This will be required to open the PDF.
Your protected file is ready — encrypted locally, never sent to any server.
Sensitive documents deserve encryption. Whether you're sharing financial reports, personal records, legal contracts, or confidential business plans, adding a password ensures only authorized recipients can open your PDF.
PDFably's protection tool is uniquely secure because the encryption happens entirely in your browser. Your password is never transmitted over the internet — it exists only in your browser's memory for the few seconds needed to encrypt the file. Traditional online tools require uploading your unencrypted document to their servers, which introduces privacy risk even if they promise to delete files afterward.
After protection, anyone who tries to open the PDF will be prompted for the password. Without it, the document's contents remain inaccessible. Make sure to share your password through a different channel than the PDF itself — send the file by email and the password by text message, for example.
PDFably applies PDF standard encryption using the pdf-lib library. This sets both a user password (required to open) and an owner password for the document.
Yes. Open the protected PDF with your password, then use any PDF tool to save it without protection. You'll need to remember your password — PDFably doesn't store it.
No. Your password exists only in your browser's memory during processing. It is never transmitted, logged, or stored. When you close the page, the password is gone.
Use at least 8 characters with a mix of letters, numbers, and symbols. Avoid common words or personal information. The stronger your password, the harder it is to crack.
Yes. PDFably works in any modern mobile browser. Upload your PDF, enter a password, and download the encrypted file — all on your phone.