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PDF Annotator

Add visual annotations like highlights, underlines, strikeouts, and shapes to your PDF pages. Perfect for reviewing documents, marking up text, and adding visual emphasis. Documents stay on your device — editing and conversion run locally in your browser.

Runs on pdf-lib

100% Local Browser Native

How to Use the PDF Annotator

1. Upload files

Drop the batch. Processing runs on pdf-lib.

2. Configure annotate

Set the annotate options once — one configuration applies to the whole batch.

3. Download results

Files save straight to your device — downloads on local tools are unlimited.

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Frequently Asked Questions

Highlights, underlines, strikeouts — which when?

Highlights for key lines, underlines for definitions, strikeouts for deletions under review.

Do collaborators see annotations?

Yes — annotations save into the exported PDF, visible in any reader.

Shapes for review markup?

Arrows, boxes, and callouts point at exactly the clause under discussion.

Is my annotated PDF uploaded anywhere when using PDF Annotator?

No — annotation runs locally in your browser; unlimited saves on local tools.

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Last updated October 2026