How to Compare PDF Files Online
Compare two PDF documents directly in your browser with EDITHUBS. Upload an original file and a revised version, then review detected text changes, added or removed content, image differences, formatting updates, and page-level variations. The tool is useful for contracts, reports, proposals, invoices, policies, manuals, academic documents, and revision workflows.
Upload the original PDF
Choose the first document as the original or reference version. This should be the file you want to compare against, such as an earlier contract, report, invoice, proposal, policy, manual, or document draft.
Upload the revised PDF
Choose the second document as the updated version. Check the file name carefully so the original and revised PDFs are not reversed before starting the comparison.
Start the document comparison
EDITHUBS analyzes both PDFs and matches their pages and visible content. The comparison may examine text, images, layout, page structure, and other supported document elements.
Review text changes
Inspect words, sentences, numbers, dates, headings, labels, and paragraphs that were added, removed, or modified. Pay special attention to legal terms, prices, totals, deadlines, and names.
Check added and removed content
Review sections, images, tables, signatures, notes, or complete pages that exist in only one version. Added or deleted content can be more important than small formatting changes.
Compare layout and formatting
Look for changes in font size, alignment, spacing, colors, margins, page breaks, tables, images, and object positions. Visual differences may affect printing, readability, or document meaning.
Review pages side by side
Use the available side-by-side, overlay, or highlighted view to compare matching pages. Page-by-page review helps confirm whether a difference is intentional or caused by layout movement.
Inspect scanned and image-based pages
For scanned PDFs, review page rotation, image position, missing marks, stamps, handwritten notes, and visual changes. Clear scans and similar page alignment usually produce better comparison results.
Save or record the comparison result
After reviewing all differences, download or record the available comparison result if supported. Keep both original PDFs as references and use the findings for approval, proofreading, auditing, or document revision.
Why use this free online PDF comparison tool?
- Compare an original PDF with a revised version.
- Review added, removed, and modified text.
- Detect visible layout, image, and formatting changes.
- Compare matching pages in a clear review workflow.
- Analyze text-based and scanned PDF documents.
- Use the tool on desktop computers, phones, and tablets.