DOCUMENT REVIEW · BROWSER LOCAL

Compare PDFs

Review page appearance side by side and highlight rendered differences. Files stay in this browser.

Original PDFRevised PDF

Up to 25 MB and 60 pages per file. Password-protected PDFs are not supported.

Choose two PDFs to begin.

Whole-document overview

Compare all active page pairs using the selected tolerance. Extra pages are listed separately. Insertions and reordering can shift numeric pairs; review the matching suggestions or choose pages independently.

Match inserted or reordered pages

Suggest pairs from selectable text, then review every pairing. Similarity scores are text overlap, not confidence probabilities. Repeated text, scans and pages with little text can be ambiguous. These suggestions do not compare images or prove that pages are equivalent.

Numeric pairing is active.

I reviewed the pairs and unmatched pages.

Pairing: numeric page order.

Show differences and unmatched pages only

No document-wide review yet.

Original pageRevised pageDifference tolerance Ignore spacing and line-break changes in text

Original

Revised

Differences in pink

Selectable-text changes

Compare pages to review text.

Removed Added. Matching follows extracted text order, including punctuation and letter case. This is a text sequence comparison, not an assessment of meaning.

Green underlines show additions; pink strike-throughs show removals. Up to 100,000 characters and 2,000 alignment tokens per page. A token is a word, punctuation mark or whitespace run; change counts exclude whitespace. Blank extraction does not prove a page has no words. PDF reading order, text encoding and OCR quality can affect results; original text remains available below.

Selectable text from these pages

Reading order comes from the PDF. Scans need OCR; images and outlined text have no extractable words.

Original textRevised text

What this comparison measures

Pages are aligned at the top left at one shared scale, up to 1,200 pixels on the longest page edge. Different sizes appear on a white shared canvas. Pink pixels exceed the selected RGB tolerance. This is a rendered appearance check, not a semantic comparison or proof that documents are identical. Small details below the render resolution may be missed. Font rendering and anti-aliasing may produce differences.

Page pairs start in numeric order; select pages manually after insertions or reordering. The document overview lists unmatched pages; review their contents manually. Forms, attachments, signatures, metadata, non-extracted hidden content and interactive behaviour are not compared. Selectable text is shown separately, in the PDF extraction order. Text alignment does not infer columns or reading order.