or drop files here
All checks run locally — your confidential drafts are never uploaded.
PDF Proofreader scans every page for common writing issues and gives you a readability score so you can polish the document before it goes out.
Readability score: Flesch reading-ease for the whole document. Common slips: Repeated words, double spaces, punctuation spacing.
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 PDF Proofreader 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.
Flesch reading-ease for the whole document.
Your documents are processed locally on your device—we never collect, upload, or store your files.
Repeated words, double spaces, punctuation spacing.
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 PDF Proofreader 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.