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Annotate PDF for engineers
Updated July 2026
Arthize lets engineering teams 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 engineers annotate a PDF
An engineer merges drawings and specs into one submittal, compares two revisions to catch changes, and archives the final set as PDF/A so it stays readable for the project's lifetime.
Built for drawings. Whether it's drawings, specifications, reports, Arthize's annotate pdf keeps the work inside your private workspace. Project documents can be commercially sensitive; a private workspace protects designs and client data.
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 engineers 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 engineering teams can use it for drawings without a confidentiality risk.
- Is it private to annotate a PDF sensitive drawings?
- Yes. Project documents can be commercially sensitive; a private workspace protects designs and client data. 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.
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