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Protect PDF

Add a password and encryption to keep your PDF private and secure.

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Max 5MB · encrypted in transit · auto-deleted after use · 10 conversions left today · Sign up free for more

  • Encrypted upload
  • Deleted after download
  • No sign-up needed
  • Works on all devices
Input PDF
Output PDF
How it works

How to Password Protect a PDF Online

  1. 1 Upload your PDF

    Choose the document you want to keep private.

  2. 2 Set a password

    Encrypt the PDF with a password only you and your readers know.

  3. 3 Download the protected PDF

    Save a secured PDF that blocks unauthorized access.

What you get

Features of Protect PDF Tool

Protect PDF

  • Encrypt with a password

    Lock your PDF so only people with the password can open it.

  • Strong encryption

    Industry-standard AES encryption protects the contents.

  • Set permissions

    Restrict printing, copying or editing while still allowing viewing.

  • Remove it later

    Take the password off anytime with Unlock PDF.

  • Browser based

    Protect PDFs on any device, with no install.

  • Private processing

    Files and passwords are encrypted and deleted automatically.

Protect your important PDF files with a password using this free online PDF password protection tool. Encrypt your documents so only people with the correct password can open them. It is perfect for securing contracts, bank statements, personal records, and other confidential files. There is no signup, no watermark, and the tool works in any modern web browser.

Password Protect Your PDF Files

Before sharing sensitive documents, it is important to keep them secure. This tool adds strong password protection to your PDF, preventing unauthorized people from opening or viewing its contents. Whether you are sending financial records, legal documents, medical files, or business reports, password protection helps keep your information private. If you have multiple PDFs, you can combine them into a single file before adding password protection, making it easier to manage and share securely.

Create a Strong Password for Better Security

Your PDF is only as secure as the password you choose. Use a long, unique password that is difficult to guess and avoid reusing passwords from other accounts. For extra security, share the password with the recipient through a different method, such as a phone call or text message, instead of sending it in the same email as the PDF. If you ever need to remove the password from a document you own, you can use a PDF Unlock tool to create an accessible copy. Always protect and share documents responsibly.

Free, Secure, and Works on Any Device

This online PDF password protection tool is completely free to use and does not require an account. Your files are uploaded through a secure HTTPS connection, and all uploaded documents are automatically deleted from the server after processing to help protect your privacy. The password you create is never stored by the tool. It works on Windows, Linux, Android, Mac and iPhone, allowing you to encrypt PDF files from any device without installing software. Once protected, your PDF is ready to download, share, and store securely.

FAQ

Frequently asked questions

How do I add a password to a PDF?
Upload your PDF, choose a strong password, and the tool encrypts the file so it can only be opened by someone who knows that password. You then download the protected copy. Anyone you share it with must enter the password to view the contents, which keeps private documents like statements, contracts, and medical records secure in transit and at rest.
Is the password-protect tool free and watermark-free?
Adding a password to PDF file is free, needs no account, and never adds a watermark on your document. You can protect as many files as you need and download each encrypted copy directly. It works in any modern browser across Windows, Mac, Linux, Android and iPhone, so securing a sensitive PDF does not require buying dedicated software.
What type of encryption is used to protect the PDF?
The tool applies strong, standard PDF encryption so the file's contents are unreadable without the correct password. This is the same kind of protection used for confidential business and personal documents. Your security still depends on choosing a strong, unique password and sharing it through a separate channel, since anyone who has the password can open the file.
What happens if I forget the PDF password?
If you forget the password, there is no built-in way to recover it, because the protection is not helpful if it can be bypassed. Store the password in a trusted password manager and share it separately from the file. For a document you own and can already open, you can remove the password using our unlock tool, but only for files you are authorized to access.
Can I set different passwords for opening and editing?
PDF protection can distinguish between a password to open the file and permission controls that restrict actions like printing or editing. This tool secures your document so it stays private, and you should always pick a strong open password for sensitive material. Share that password only with the people who genuinely need access, and choose a different one for each highly confidential document.
Is it safe to protect my PDF online?
Your file is uploaded over an encrypted connection and automatically deleted from the server a short time after the protected copy is created. No signup is required, so the document is not linked to an account. The password you choose is used only to encrypt your file and is not stored, so your protection stays entirely in your control.
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