Compare two PDFs

Choose a PDF or drop them here

Processed on this device. Nothing is uploaded.

Short answer

Add two PDFs and every page is compared by its text, word for word — additions, removals and pages that only exist in one version. Both files stay on your device throughout, which matters for a comparison that is often between two drafts of something confidential.

Next step

Merge PDF files Extract pages from a PDF Add a watermark to a PDF

Doing more than one thing?

The full editor puts every operation in one workspace with undo, so you are not exporting and re-opening between each step. Same engine, same privacy, still nothing uploaded.

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Why this one does not upload your file

Almost every free compare two pdfs tool works by sending your document to a server, doing the work there, and sending a result back. That is a cost decision rather than a privacy one — server time costs money, which is why those tools meter you, ask for an account, or cap your file size.

This one runs the same work in your browser using JavaScript, so your file never travels anywhere. There is no upload step, no queue, no account, and no page limit — and the page keeps working if you disconnect from the internet partway through.

You do not have to take that on trust. Open your browser's network tab and watch while you work, or read how it works.

What happens to your file

It is read from your disk into this tab's memory
Every change happens on your own processor
The result is built in memory, reopened and checked before you are offered it
Your original file is never modified
Closing the tab releases everything — nothing is stored

Questions

Straight answers

Does it compare the visual layout or the text?

The text. Two pages that render with slightly different spacing but say the same thing are correctly reported as unchanged; a single word swapped is correctly reported as a change. A pixel comparison would flag the first case as different, which is not useful.

What if a scanned page is in one of the files?

A scan has no text layer, so it cannot be compared this way. The report says so for that page rather than silently treating no text as no change.

Can I compare more than two files?

Not in one pass. Compare them two at a time — original against draft one, draft one against draft two.

Can I keep the comparison?

Yes, there is a button to download it as a plain text report listing every page that changed and by how much.

More tools

Everything else, also free

Merge PDF filesAdd two or more PDFs, drag them into the order you want, and press Merge. Split a PDFOpen your PDF, choose how many pages each output file should contain, and press Split. Compress a PDFOpen your PDF and choose a quality level. Rotate PDF pagesOpen your PDF, turn every page at once or click individual pages to rotate just those, then download. Delete pages from a PDFOpen your PDF, click the pages you want gone, and download the result. Extract pages from a PDFOpen your PDF and either type a range such as 3-7, or click the pages you want in the grid. Convert PDF to JPGOpen your PDF, pick a resolution and image format, and every page is rendered to an image in your browser. Convert images to PDFAdd your images, drag them into order, choose a page size, and they become a single PDF built in your browser.

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