annotate pdf for researchers →
Annotate PDF for researchers
Updated July 2026
Arthize lets researchers and academics annotate a PDF in a private workspace — free, with no watermark. Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text.
Why researchers annotate a PDF
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 annotate 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 Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools.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 annotate a PDF
Annotations sit on top of the page and don't change the underlying text.
You can highlight, comment, draw and add notes.
Annotated files are ideal for review and feedback.
How to annotate a PDF
- 1
Open the editor
Sign in and open the PDF editor.
- 2
Add your PDF
Upload the document to mark up.
- 3
Add annotations
Highlight text, add comments, draw shapes or leave notes.
- 4
Download
Save the annotated PDF.
Common questions
- How do researchers annotate a PDF for free?
- Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. 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 annotate a PDF 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 Unpublished work and grant applications are confidential; a private workspace keeps them out of public tools.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 annotate a PDF?
- Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. On Arthize it's free with no watermark and processed privately.
- Can I highlight and comment on a PDF?
- Annotating a PDF adds highlights, comments, shapes and notes on top of the page, so you can mark up a document without changing its text. On Arthize it's free with no watermark and processed privately.
Related
Everything is in one window.
Arthize bundles 50+ PDF tools in one private workspace. Start free — no watermark, no credit card.
Annotate PDF free