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Protect PDF with Password

Encrypt your PDF documents with standard 128-bit/256-bit AES password protection entirely on your device.

โœ“ 100% Free ๐Ÿ‘ค No Registration โšก Fast Vector Engine ๐Ÿ”’ Zero Server Uploads
PDF Tools Illustration
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Drag & Drop a PDF File here or Click to Browse

Select the PDF document you want to lock with password encryption.

๐Ÿ”’ Bank-Grade Security: Your document and password never leave your device.

Why Protect PDF Documents with Local Encryption?

When emailing income tax returns, Aadhaar documents, contracts, or salary slips, leaving them unencrypted invites interception and unauthorized viewing. Most online PDF protectors require you to upload your confidential files to their cloud servers, defeating the purpose of security. AG World Tools implements the official PDF standard security handler (ISO 32000 Algorithm 2 & 3) strictly inside your web browser. Neither your document nor your password is ever transmitted over the network.

๐Ÿ›ก๏ธ Real In-Memory Encryption
Standard-compliant 128-bit encryption prompts for password in Adobe Acrobat, Apple Preview, Google Chrome, and any PDF reader.
๐Ÿ”’ Zero Cloud Leaks
Your password and document are processed exclusively in your device RAM and wiped the moment the tab is closed.
โš™๏ธ Custom Permission Flags
Control whether recipients can print, copy text, or modify form fields on the protected PDF.

Frequently Asked Questions

Will the recipient need special software to open the PDF?

No. Our encryption adheres to official ISO 32000 PDF standards. Any standard viewer โ€” including Adobe Acrobat Reader, Google Chrome, Safari, Microsoft Edge, and mobile phones โ€” will display the standard password unlock prompt.

Can AG World Tools recover my password if I forget it?

No. Because all encryption occurs locally inside your browser and zero data is sent to our servers, we have no record of your password. Be sure to remember or safely store your password before encrypting.

Can already-encrypted PDFs be protected again?

If your PDF already has a password, please use our Unlock PDF tool first to remove the old password before applying a new one.