LovePDFImg
All Tools
Home
PDF Tools Merge PDF Split PDF Rotate PDF
Image Tools Compress JPG Resize Image
Blog About All Tools
Home / All Tools / Protect PDF
🔒

Protect PDF with a Password

Add a password to your PDF so only people who know it can open the file. Encryption is applied locally in your browser.

📄

Drop a PDF file here

or click to browse from your device

Select PDF File
Add a PDF file to get started.

✅ Your protected PDF is ready!

Advertisement

Free Online PDF Password Protector

If you're sharing a PDF that contains sensitive information — financial statements, personal documents, internal reports — adding a password is one of the simplest ways to add a layer of protection. LovePDFImg's Protect PDF tool lets you set a password that PDF readers will require before the document can be opened.

The encryption is applied using the PDF format's standard security handler, the same mechanism used by many PDF applications, computed directly in your browser using JavaScript. Your file and the password you choose are never sent anywhere — the entire encryption process happens on your device, and the protected file is generated and offered to you as a direct download.

protect pdf with password add password to pdf online pdf password protector free encrypt pdf online secure pdf file
Advertisement

How to Add a Password to a PDF

  1. 1Upload your PDFDrag and drop your file or click to browse and select it from your device.
  2. 2Enter a passwordType the password you want to use, and confirm it in the second field.
  3. 3Click "Protect PDF"The tool encrypts your file with the password using your browser's JavaScript engine.
  4. 4Download your fileYour password-protected PDF is ready to download. Anyone opening it will be prompted for the password.

Frequently Asked Questions

This tool applies standard PDF password protection using RC4 40-bit encryption with a user password, following the PDF specification's standard security handler. The password will be required by PDF readers such as Adobe Acrobat to open the file.
The encryption follows the PDF standard security handler used since early versions of the PDF format, so it is widely supported by common PDF readers including Adobe Acrobat, browser PDF viewers, and most third-party readers.
Yes, using our PDF Unlock tool. You will need to know the password that was set in order to remove it.
There is no way to recover a forgotten password from an encrypted PDF. Keep your password somewhere safe — without it, the protected PDF cannot be opened.
No. The encryption is applied entirely in your browser using JavaScript. Your file and your chosen password never leave your device.

Related PDF Tools

🔓

Unlock PDF

Remove a known password from a PDF.

 💧

Add Watermark

Stamp text or logos across your PDF.

 ⊕

Merge PDF

Combine multiple PDFs into one file.

 ℹ

Metadata Editor

Edit title, author and other PDF info.