# Compare PDF for researchers

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

Arthize lets researchers and academics 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 researchers compare two PDFs

A researcher merges a paper with its appendices, extracts a results table into Excel for re-analysis, and compresses the figure-heavy submission under a journal's upload limit — privately.

**Built for papers.** Whether it's papers, datasets, appendices, Arthize's compare pdf keeps the work inside your private workspace. Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools.

## 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 researchers 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 researchers and academics can use it for papers without a confidentiality risk.

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

Yes. Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools. 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.