Compare two PDF files online for free directly in your browser. Perform visual pixel-by-pixel image diffing, side-by-side synchronized scrolling, Myers text content comparison, and interactive swipe slider curtain reviews without uploading confidential documents to any server. 100% client-side privacy protection powered by RiazHub.com.
Compare Two PDF Files
Perform visual pixel-by-pixel image diffing, text content comparison, and synchronized side-by-side review directly in your browser.
Drag & drop baseline PDF here or Browse File
Supports contract proofs, invoices, legal docs (PDF)Drag & drop revision PDF here or Browse File
Supports updated layouts, revised texts (PDF)Frequently Asked Questions & Guide
How does client-side PDF comparison work securely? ❯
Our tool runs 100% inside your browser using HTML5 Web Canvases, PDF.js rendering, and client-side Myers diffing algorithms. Your confidential documents, legal contracts, architectural drafts, or financial invoices are never uploaded to any server or third-party web cloud.
What is the difference between Visual Image Diff and Text Diff? ❯
Visual Image Diff rasterizes matching pages and checks pixel RGB values to highlight shifted elements, font changes, altered logos, or deleted shapes in high-contrast red/magenta. Text Diff extracts textual content directly to highlight inserted words in green and removed lines in red regardless of visual layout changes.
What are the best use cases for this PDF comparison tool? ❯
Ideal for reviewing revised legal contracts, verifying architectural blue-prints, checking invoice revision numbers, proofreading published book pages, and validating PDF export differences across design software releases.