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Do I need to install software to annotate a PDF?
Updated July 2026
No. You annotate a PDF entirely in the browser — there is nothing to download or install. 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.
Answer
No. You annotate a PDF entirely in the browser — there is nothing to download or install. 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.
More about annotate 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 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.
- Is annotating a PDF 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 processed privately.
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