DrawDiff review
A free, focused tool for visual and text comparison of scanned or revised PDFs.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
DrawDiff is a browser-based PDF comparison tool for engineering drawings, technical documents, contracts, and other revisions. It compares PDF pages pixel by pixel, using color-coded overlays to show additions, removals, and unchanged content. Its free plan includes PDF comparison, pixel-accurate overlays, local browser processing, and JPG or PDF export. Because it requires no account and can continue working offline after loading, it suits individuals and teams that need a focused way to inspect document revisions without a subscription.
Its standout capability is visual inspection at the page and region level. An alignment tool helps account for shifted views, while automatic detection and numbering identify difference regions. The region inspector can show the overlay, original, and revised views together. For selected areas, DrawDiff adds word-level text comparison, and OCR fallback supports scanned or image-based PDFs. Together, these features make the product useful when formatting changes, drawing revisions, or image-based content matter as much as extracted text.
DrawDiff keeps its scope narrow: the published feature set centers on PDF comparison, visual overlays, OCR fallback, region inspection, and export. It is a strong fit for buyers who want free, browser-based PDF review with local processing and no account requirement. It is less suitable for teams looking for a broader document-comparison system spanning multiple file formats or a centralized platform workflow. Buyers who primarily compare PDFs, especially scanned documents, should find its focused approach aligned with that task.
DrawDiff pros and cons
- Where it wins
- Pixel-by-pixel overlays show additions, removals, and unchanged content
- OCR fallback and selected-region text comparison support scanned PDFs
- Local browser processing, offline continuation, and JPG/PDF exports
- Where it doesn't
- Web-only, with processing centered in the local browser
- Focused on PDF comparison rather than a broad document-format set
- Offline use begins only after the application has loaded
DrawDiff fact sheet, pricing and score →
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