Private browser PDF editing

Compare two PDF files online.

Find added and removed selectable text page by page, review document changes, and download a comparison report privately in your browser.

How to compare two PDF files

1. Choose the older and newer PDFs.
2. Select whether to ignore whitespace or capitalization.
3. Compare selectable text locally in your browser.
4. Review changed pages and download a text report.

Page-by-page text differences

PDFMech extracts selectable text and identifies added and removed lines on matching page numbers.

Private local comparison

Both PDFs are read and compared in your browser without uploading either document to a comparison server.

Text-only comparison limits

This version does not detect images, fonts, colors, formatting, drawings, or layout-only changes. Image-only scans need OCR first.

Compare two PDF files online FAQ

Are my PDFs uploaded?

No. Text extraction and comparison run locally in your browser.

Can it compare scanned PDFs?

Only after the scans contain searchable text. Use PDFMech OCR first when a page is image-only.

Does it compare images and formatting?

No. This version compares selectable text, not images, fonts, colors, drawings, or visual layout.

Why can added pages affect later results?

Pages are compared by page number. If one version inserts or removes a page, later pages may no longer be aligned with their matching content.