Compare two PDF files side by side — highlights pixel-level differences between documents.
PDF Compare is a free online tool that lets you compare two PDF files and see exactly what changed between them. Upload two PDFs and the tool renders each page at the same resolution, then performs a pixel-level comparison. Differences are highlighted in red on a grayscale background. View results side-by-side or in diff view, navigate through all pages, and see the difference percentage for each page. Perfect for comparing document revisions, contract changes, or design iterations.
Drop or click to upload the original PDF document in the left panel.
Drop or click to upload the modified PDF document in the right panel.
Click Compare. Each page is rendered and compared pixel by pixel.
Navigate pages with arrows. Red areas show differences. The percentage indicates how much of the page changed.
Toggle between Side by Side (see both versions) and Diff View (red overlay on grayscale) for different perspectives.
Combine multiple PDF files into one document. Drag to reorder pages before merging. 100% browser-based.
Reduce PDF file size by optimizing images and removing metadata. See before/after compression ratio.
Split a PDF into individual pages or custom page ranges. Extract specific pages instantly.
Convert PDF pages to high-quality PNG, JPEG or WebP images. Batch export all pages at once.
Convert JPEG, PNG and WebP images to a single PDF document. Custom page size and margins.
Extract all text content from PDF files. Preserves paragraphs and formatting structure.