or drop files here
Metadata such as author and editing software is removed automatically. Password encryption is on our roadmap.
Protect PDF flattens each page into a high-resolution image layer. Form fields, comments and editable text are locked into the page, making the document tamper-resistant and hard to copy.
Tamper-resistant: Edits, form values and comments are locked in. Copy-resistant: Text is no longer selectable.
Your documents are processed entirely inside your browser memory using WebAssembly and HTML5 Canvas. Files never leave your computer or phone.
Balanced size & high visual quality
Smallest file size (up to -90%)
Use Protect PDF directly in your browser—no software installations, sign-ups, or learning curves.
Run smoothly in Chrome, Safari, Edge, or Firefox on desktop, laptop, tablet, and smartphone.
Edits, form values and comments are locked in.
Your documents are processed locally on your device—we never collect, upload, or store your files.
Text is no longer selectable.
Every option is unlocked for free with no daily task timers, no paywalls, and no watermarks.
Step-by-step guide to getting the fastest, cleanest result with Protect PDF directly in your browser without installing software.
Learn how our local WebAssembly engine preserves fonts, layout, and clarity while processing your document.
Understand how browser-based PDF processing protects confidential contracts, resumes, and financial records.
Boost productivity with unlimited, 100% free access to all of Fr. Tools’ private browser-based PDF tools for taking the hassle out of document work. Do more, better, faster.