PDF

Protect PDF

Add a password and restrict permissions on PDF files.

Click or drag & drop

PDF files only

Passwords

Set passwords to control access and editing.

Open password *

Owner password (optional)

Permissions

Control what recipients can do with the PDF.

Allow printing

Recipients can print the document

Allow copying text

Recipients can copy text from the document

Upload a PDF to protect with a password.

Uses 128-bit RC4 encryption. The owner password controls permission restrictions — leave blank to use the user password as owner password.

PixTrimIO keeps PDF and image workflows fast, privacy-friendly, and browser-based. Privacy-first PDF and image tools that run entirely in your browser. Compress, merge, convert, crop, OCR, and edit files online for free without uploading.

Frequently asked questions

What kind of protection can I add?

You can set an open password (required to view the file) and restrict printing, copying, and editing.

Is encryption strong?

The tool applies 128-bit RC4 or 128-bit AES encryption depending on the PDF version.

Is my PDF uploaded?

No. Password protection is applied securely in your browser without uploading.

How to password protect a PDF online for free

Add a password and permission restrictions to a PDF securely in your browser without uploading.

Upload your PDF — Click or drag and drop the PDF to protect.

Set password — Enter the password users will need to open the file.

Choose permissions — Optionally restrict printing, copying, or editing.

Apply & download — Click Protect PDF and download the secured file.