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.

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

PDF

Bảo vệ PDF

Thêm mật khẩu và giới hạn quyền truy cập vào file PDF.

Nhấp hoặc kéo thả

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 giúp xử lý PDF và ảnh nhanh, riêng tư và ngay trên trình duyệt. 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.