Skip to content
Sırdaş
es · Español
Try it freeToolsAI datasets NewDevelopersServidor MCPCLIPythonn8nTypeScriptAgent SkillSkill: invoicesSkill: contractsBlogBusiness

Password-protect a PDF

To password-protect a PDF without uploading it: drop it here, type a password or generate a strong one, choose whether it can be printed, copied or edited, and press Protect PDF. It is encrypted with AES-256 in your browser, with qpdf compiled to WebAssembly, and any current reader opens it.

Reviewed on

Sent to servers: 0 BNothing left your device

About this tool

Before emailing a medical record, a payslip or a contract, it is worth making the file ask for a password to open. That way, if the email ends up in the wrong place, the document cannot be read.

The encryption is AES-256, which Acrobat, Chrome, Preview and any current reader open. You can also remove permissions: no printing, no copying text, no editing. Serious readers respect those permissions, but they are not a strong barrier: what really protects the file is the open password.

Keep the password safe. We do not know it, it is not sent anywhere and there is no way to recover it. Send it through a different channel from the file, for example by message if the PDF goes by email.

How it works

  1. 01

    Drop the PDF.

  2. 02

    Type a password or press Generate a strong one, and copy it.

  3. 03

    Choose whether it can be printed, copied or edited.

  4. 04

    Press Protect PDF and download the encrypted file.

Questions

How can I check that my file is not uploaded?
Open your browser's developer tools (F12), Network tab, and process a file: no request carries your document. Or load the page, go offline and use it: it keeps working.
What encryption does it use?
AES-256, the strongest the PDF standard defines. It is applied by qpdf, compiled to WebAssembly and served from this same site.
What if I forget the password?
It cannot be recovered: we do not know it and it is not stored anywhere. Keep it in your password manager.
Are the no-print or no-copy permissions secure?
They are a hint that serious readers respect, but they can be removed without the password. What protects the content is the open password.
My PDF already has a password. Can I change it?
Remove it first with Remove password, then protect it again with the new one.
How should I send the password?
Through a different channel from the file: if the PDF goes by email, send the password by message or in person.

More tools