Compare PDF Documents Online

Compare PDF Documents Online — Visual PDF Diff Tool in Your Browser

Browser-based document version comparison — see exactly what changed between two PDFs without uploading either file.

Pro+ Feature
Subscription required

Visual diff with amber highlights — not available on free or Day Pass tiers.

Available on Professional (£15/mo) and Business (£35/mo) plans.

Professional unlocks Redact, Compare, Repair, E-Sign, and all core tools with unlimited use.

Three steps. No account.

1
Load two PDFs
Drop your original and revised documents into DocShift.
2
Run the comparison
Differences are highlighted visually across both documents.
3
Review and export
Download the annotated comparison output for records or review.
  • Visual side-by-side diff with highlights marking every changed region
  • Compares both text content and layout changes across all pages simultaneously
  • Entirely local processing — neither version of your document leaves your device
  • Output is an annotated PDF suitable for review workflows and audit trails

“Both versions of your document are compared entirely within your browser — two confidential drafts, a contract and its revision, or a regulatory submission and its amendment never leave your device.”

How we compare

Document comparison tools that run server-side require you to upload both versions of a confidential document simultaneously. For legal, financial, and regulated documents, that is a significant and unnecessary exposure. DocShift compares locally.

DocShift detects text additions, deletions, and modifications, as well as layout and formatting changes that alter the visual appearance of a page. Minor rendering differences that do not represent actual content changes — such as font hinting variations — are filtered from the output.

Yes. DocShift compares the rendered content of PDFs regardless of their origin — you can compare a PDF generated from Word against a scanned PDF of the same document. The comparison operates at the visual and text layer level rather than file structure, making cross-origin comparison reliable.

DocShift's comparison output is an annotated PDF that clearly documents the visual and textual differences between two document versions. Its suitability for specific legal or regulatory purposes depends on the requirements of your context. For internal review and audit trail documentation, it provides a clear and accurate record of changes.