Protect PDF Online Free
Protect your PDF files by flattening editable layers, stripping hidden author metadata, and applying security stamps. 100% private client-side processing in your browser with zero server uploads.
Click to select file or drag & drop here
Supported formats: application/pdf • Processed 100% locally in your browser
How to Use Protect PDF Online
Upload PDF Document
Select the PDF file you want to harden against tampering and metadata leaks.
Choose Protection Controls
Enable Metadata Scrubbing, Form Flattening, Tamper-Proof Page Rasterization, and Security Banner.
Download Protected PDF
Export your hardened, sanitized PDF file.
Frequently Asked Questions — Protect PDF
What does Tamper-Proof Rasterization do?
It converts vector text and editable objects into flat, non-editable page renders so text cannot be altered.
What hidden metadata is removed?
Author name, creator software, producer history, keywords, and modification timestamps are wiped.
Is it 100% client-side?
Yes, all security processing happens in your browser.