How it works
Open the PDF and navigate to the page or passage that needs review markup.
Annotate PDF
Add highlights, notes, and outlined areas to PDF pages.
Free
No signup
Local browser processing
02
Choose the annotation type: highlight, note/text, freehand drawing, or an outlined/shape area, then select its page and visual settings.
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Place annotations near the exact sentence, diagram, or region they refer to. Use zoom when marking small text.
Guide
What this tool does
What this tool does
Add review annotations such as highlights, notes, drawings, and outlined areas without changing the source file.
Typical uses
- Review a manuscript or report with visual feedback.
- Mark important paragraphs, diagrams, errors, or action items for a colleague.
Detailed step-by-step guide
- Open the PDF and navigate to the page or passage that needs review markup.
- Choose the annotation type: highlight, note/text, freehand drawing, or an outlined/shape area, then select its page and visual settings.
- Place annotations near the exact sentence, diagram, or region they refer to. Use zoom when marking small text.
- Export the annotated PDF and check that every annotation remains visible and does not cover essential content.
What this tool can do
- Adds visual review markup to PDF pages.
- Supports multiple annotation styles in one document.
- Creates a separate annotated output file.
Tips for this tool
- Use consistent colors for one meaning, such as yellow for review and red for correction.
- Keep notes short enough that they do not obscure the page.
Privacy and processing
While using Annotate PDF, this published version performs the supported document operation in your browser and does not send the document contents to an external conversion engine. Anonymous usage counters may record activity, not the document contents.
Important limitations
- Some annotations are burned into page appearance rather than stored as native PDF comment objects.
- This tool is for markup, not permanent secure redaction.
FAQ
Frequently asked questions
What is Annotate PDF best used for?
Review a manuscript or report with visual feedback. Mark important paragraphs, diagrams, errors, or action items for a colleague.
What should I check before using Annotate PDF?
Use consistent colors for one meaning, such as yellow for review and red for correction. Keep notes short enough that they do not obscure the page.
What are the limits of Annotate PDF?
Some annotations are burned into page appearance rather than stored as native PDF comment objects. This tool is for markup, not permanent secure redaction.