MostlyPDF

Compare PDF

Upload two versions of a document and get a side-by-side report of every added, removed and changed line.

Open Compare PDF

How to use Compare PDF

  1. Upload your filesDrop your PDFs or images onto the Compare PDF tool, or browse to select.
  2. Set your optionsChoose how you want Compare PDF to run — the options that matter, nothing more.
  3. DownloadRun the tool and download your finished file instantly.
Accepts
Two PDFs (the two versions to compare)
Gives you
A report of every added, removed and changed line
Where it runs
On our servers, over an encrypted connection; deleted within 24 hours
Price
Free — no sign-up, no watermark

Common questions

Is Compare PDF free?

Yes — Compare PDF is free with no sign-up, no watermark and no daily limit on this tool. Heavier operations (OCR, conversion) have a generous daily quota on the free plan and are unlimited on Pro.

How do I compare two pdfs?

Open Compare PDF, drop your files, set the options, and download the result in a few seconds — processed securely, no queue and no ads.

Are my files safe?

Compare PDF needs our conversion servers, so the file is sent over an encrypted connection, used only for your task and deleted within 24 hours. The page tools (merge, split, rotate, organize, page numbers, watermark, crop, form filling, image to PDF) run entirely in your browser instead and never upload anything.

Does it show what changed, or just that something did?

It shows the changes themselves, line by line — what was added, what was removed and what was edited — side by side, so you can review a contract revision without reading both copies in full.

All tools

Compare: MostlyPDF vs iLovePDF · MostlyPDF vs Smallpdf · MostlyPDF vs PDF24 · MostlyPDF vs Sejda · MostlyPDF vs Stirling PDF

A Mostly Tiny product · All tools