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Annotate PDF Documents

Add highlights, sticky notes, text boxes, freehand drawing, arrows, and shapes to a PDF in your browser. Existing bookmarks and form fields stay intact.

1
Select PDF
Drop a PDF to mark up, or click to choose one from your device
2
Add annotations
Use highlight, text, shapes, and sticky note tools to annotate
3
Download
Download your annotated PDF instantly

Frequently Asked Questions

What annotation tools are available?

Highlight, underline, strikethrough, sticky notes, text boxes, freehand drawing, arrows, and shapes.

Does this preserve bookmarks and form fields?

Yes. Existing bookmarks, form fields, and other annotations remain intact; new highlights and notes are appended as a separate annotation layer.

What PDF versions are supported?

Reads PDF 1.0 through 2.0. Output is written as PDF 1.7 (the version that introduced the modern annotation dictionary).

Tool history

Updated Jun 3, 2026 · 11 updates
  • Jun 3, 2026featper-tool OG images for all 75 tools + lengthen 20 short metas (#614)
  • May 29, 2026featmobile responsive pass + design-system consolidation (#564)
  • May 23, 2026feattips on all 60 tools + HowToTip rich-result schema (#450)
See full history →
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