# Compare PDF for authors

_Updated July 2026 · Arthize · https://arthize.com/for/authors/compare-pdf_

Arthize lets authors and self-publishers compare two PDFs in a private workspace — free, with no watermark. Comparing two PDFs highlights what changed between versions — added, removed and edited text — so you can review revisions at a glance.

## Why authors compare two PDFs

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.

**Built for manuscripts.** Whether it's manuscripts, proofs, cover files, Arthize's compare pdf keeps the work inside your private workspace. Unpublished manuscripts are valuable IP; private processing keeps them off public servers.

## What matters when you compare two PDFs

Comparison highlights text differences between two versions of a document.

It is the fast way to review contract or draft revisions.

Both files are processed privately and deleted after the job.

## How to compare two PDFs

1. **Open the compare tool** — Sign in and open the Compare tool.
2. **Add both PDFs** — Upload the original and the revised version.
3. **Compare** — Arthize highlights the differences between them.
4. **Review** — Scan the highlighted changes side by side.

## FAQ

### How do authors compare two PDFs for free?

Comparing two PDFs highlights what changed between versions — added, removed and edited text — so you can review revisions at a glance. On Arthize it's free with no watermark, and the file is deleted after the job — which is why authors and self-publishers can use it for manuscripts without a confidentiality risk.

### Is it private to compare two PDFs sensitive manuscripts?

Yes. Unpublished manuscripts are valuable IP; private processing keeps them off public servers. Files are processed inside your private Arthize workspace and deleted after the job.

### How do I compare two versions of a PDF?

Comparing two PDFs highlights what changed between versions — added, removed and edited text — so you can review revisions at a glance. On Arthize it's free with no watermark and processed privately.

### Can I see what text changed between two PDFs?

Comparing two PDFs highlights what changed between versions — added, removed and edited text — so you can review revisions at a glance. On Arthize it's free with no watermark and processed privately.