Skip to content
Convertto

Compare Two PDFs — Side by Side, Overlaid, or Swiped

See two versions side by side, overlaid or wiped between — with every changed area outlined.

To compare two PDFs, add the original and the revised version. Both are rendered and compared pixel by pixel, and every area that differs is outlined — so a moved logo, a dropped table column or a changed figure is visible immediately. Read them side by side, overlay them so additions and removals show in colour, or wipe between the two to check alignment exactly. A line-by-line text comparison is available as well, for when you need to quote precisely what changed. Both files are read in your browser, so contracts under negotiation are never uploaded.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Does this detect layout and image changes?

Yes — that is what the visual views are for. The two pages are rendered and compared pixel by pixel, so a moved logo, a changed chart or a reformatted table is outlined even when the words are identical. The separate text comparison answers the different question of which lines changed, which is what you want when you need to quote the difference rather than see it.

Which view should I use?

Side by side to read both versions. Difference to spot changes fast — the revision is faded to grey and anything added shows green, anything removed shows red. Swipe when you need to confirm two versions line up exactly, since dragging the divider makes even a one-millimetre shift obvious.

Why does a scanned PDF show as entirely different or entirely empty?

A scan is an image of text, not text, so there is nothing to extract unless the file has been through OCR. Two scans of the same page will both extract as empty and compare as identical, which is a false negative worth knowing about.

How to use the compare two pdfs

  1. 1Select your two pdfs — the file stays on your device and is never uploaded.
  2. 2Choose the compare by.
  3. 3Turn "Ignore whitespace differences" on or off as needed.
  4. 4Press Run, then download the result when it is ready.

Embed this tool

Put the working compare two pdfs on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

Share this tool

Related tools

Sign PDF DocumentDraw your signature, drag it onto the page and save a signed PDF — without uploading anything.PDF to BMP ConverterConvert PDF pages into uncompressed 24-bit BMP bitmaps.PDF to CSV ConverterExtract PDF tables into properly quoted CSV, one row per table row.PDF to Ebook ConverterTurn a PDF into a reflowable ebook you can read comfortably on a phone or e-reader.PDF to EPUB ConverterConvert a PDF into a real, reflowable EPUB 3 ebook with a chapter list.PDF to Excel ConverterExtract real tables from a PDF into an Excel workbook — columns detected, numbers kept numeric.

Last updated

More pdf tools