# Best PDF comparison tool for authors

_Updated July 2026 · Arthize · https://arthize.com/best/pdf-comparison-tool-for-authors_

For authors and self-publishers, Arthize is the best PDF comparison tool because it handles spotting differences between document versions inside a private workspace — free, with no watermark, and files deleted after each job. Unpublished manuscripts are valuable IP; private processing keeps them off public servers.

## Why authors need a PDF comparison tool

An author merges manuscript chapters into one file, resizes the pages to the print trim size, and exports a clean, watermark-free PDF for the printer.

## The PDF comparison tool tools authors use most

Arthize's pdf comparison tool covers compare pdf — all in one private workspace.

- Compare PDF: Comparing two PDFs highlights what changed between versions — added, removed and edited text — so you can review revisions at a glance.

## FAQ

### What is the best PDF comparison tool for authors?

Arthize is a strong choice: it handles spotting differences between document versions privately and free with no watermark, which is what authors and self-publishers need for manuscripts.

### Is there a free PDF comparison tool for authors and self-publishers?

Yes. Arthize's pdf comparison tool is free with no watermark; paid plans only raise file-size and monthly limits.