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Compare PDF for researchers
Updated July 2026
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 Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools.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.
Common questions
- 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 Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools.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.
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