How to Password Protect PDF Online for Free
- Step 1: Upload your PDF — Drag and drop your document into the box or browse from your device.
- Step 2: Set Password — Enter your desired password and confirm it. The real-time strength meter helps verify security.
- Step 3: Choose Permissions — Customize allowed permissions (printing, copying, annotations).
- Step 4: Click Lock PDF — The browser engine encrypts the document streams directly.
- Step 5: Download Protected PDF — Save your secure password-protected file with 100% original visual fidelity.
Bank Statements, Payslips & Confidential Proposals Protection
One Resizer provides tools designed to help prepare documents and photos for online submissions and application portals:
- Standard Security Handler: Compatible with Adobe Acrobat, Google Chrome, Apple Preview, and mobile viewers. When anyone attempts to open the document, they must enter the password.
- Lossless Encryption: Encrypts the native document streams without rasterizing or degrading page quality. Text remains sharp and selectable.
- 100% Client-Side Privacy: Sensitive financial balance sheets, tax returns, and medical records are encrypted locally in your browser with zero remote uploads.
Frequently Asked Questions
Yes. One Resizer generates standard PDF Standard Security Handler encryption (/Encrypt dictionary), which prompts for the password in Adobe Acrobat, Google Chrome, Apple Preview, and mobile PDF readers.
No. All encryption algorithms run entirely in your local browser. Your documents and passwords never leave your device.
No. The encryption process encrypts the underlying raw byte streams without converting pages to images, preserving 100% of original visual quality.