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PDF Annotator

Draw, highlight and mark up pages with your mouse or finger.

Drop your PDF here

Draw and highlight with your mouse, trackpad or finger.

Processed entirely in this browser tab. Nothing is uploaded anywhere.

Do more with your file

Edit PDF

Add text, cover mistakes and drop images straight onto a page.

PDF Reader

Open and read any PDF page by page, with zoom and text search.

PDF Form Filler

Type into a form's own fields, then save or lock your answers.

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About PDF Annotator

PDF Annotator is for reviewing: highlight passages, draw, underline and leave comments, then save a copy to send back with your feedback.

When people use it

  • Marking up a draft for a colleague or student.
  • Highlighting key clauses in a contract before a call.
  • Studying and annotating lecture notes.

Tips for better results

  • Use different colours for different kinds of comment.
  • Annotations stay editable in most viewers unless you flatten them.
  • Keep the clean original for the final version.

How to use PDF Annotator

  1. 1Open the PDF Annotator page on avalpdf.
  2. 2Drop your file in, or click to browse for it.
  3. 3Choose your options — the defaults suit most files.
  4. 4Run the tool and download the finished file.

Questions about PDF Annotator

Is PDF Annotator free to use?
Yes. Every avalpdf tool, including PDF Annotator, is free with no sign-up and no daily limit.
Are my files uploaded to a server?
No. The work happens inside your browser tab, so the file itself never leaves your device.
Does PDF Annotator work on a phone?
Yes — it works in mobile browsers on Android and iPhone as well as on desktop.

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