Password protect a PDF
Protect your PDF files with a password.
Accepted source formats
How it works
Load the PDF to protect
Set a secure password
Download the protected PDF
Common mistakes
- Using a source file of poor quality.
- Publishing without checking the final result.
- Confusing file size, dimensions and quality.
- Overwriting the original file without keeping a copy.
Pro tips
- Always keep an original version.
- Test several settings before downloading.
- Use WebP for the web when possible.
- Choose descriptive file names for SEO.
Privacy guaranteed
Your files are processed locally in your browser and are never uploaded to our servers.
Protect PDF with password for free
Secure your PDF documents with a strong password, free and without signup. Our tool lets you add password protection in seconds, preventing unauthorized access to your file. Ideal for contracts, invoices, and confidential documents. Secure your confidential PDFs with a strong password and AES encryption. Add restrictions on printing, copying or editing based on the desired permissions.
Bank-grade AES 256-bit encryption
Your PDF is protected with AES 256-bit encryption, the same security standard used by banks, governments, and military organizations. This level of protection ensures your document cannot be decrypted without the correct password.
Restrict printing, copying, and editing
Beyond the open password, set restrictions on what users can do with your PDF: prohibit printing, block text copying, prevent modifications. Keep complete control over how your documents are used.
PDF protection without software installation
Protect your PDFs directly in your browser, without downloading or installing any software. Our tool works on Windows, Mac, Linux, tablets, and smartphones. Add a password to your PDF easily, wherever you are.
Local and confidential protection
Your PDF protection happens entirely in your browser. Your file and password are never transmitted to our servers. This approach guarantees absolute confidentiality: only you know the content and encryption key.
Discover all our PDF tools
Compress, merge, convert, edit and protect your documents in a few clicks.
Complementary tools
Guides and tutorials
Learn how to use our tools with our detailed guides.
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Convert your PDF files to PDF for free, online, no signup or installation. Change file extension fast, in batch, directly in your browser.
How to convert a PDF file to PDF? online
Convert your PDF files to PDF for free, online, no signup or installation. Change file extension fast, in batch, directly in your browser.