Annotate and Mark Up PDFs Online
Add text, shapes, and annotations to your PDF
Tools
Upload a PDF
Upload a PDF to start annotating.
Upload your PDF
Drag & drop or click to browse
PDF
Add text, shapes, and annotations to your PDF
Upload a PDF to start annotating.
Upload your PDF
Drag & drop or click to browse
Review, comment on, and mark up PDF documents online. Add highlights, text comments, freehand drawings, shapes, and redact sensitive content — no software installation needed.
Yes. PDFKit supports online PDF annotation and markup workflows including text comments, sticky notes, and highlighted callouts.
You can cover sensitive regions with filled boxes or shapes to obscure content before sharing or printing the document.
Yes. Use the freehand drawing tool to sketch, circle, or underline content directly on the PDF pages.
Yes. Annotations are flattened into the PDF on download so they appear correctly on all PDF viewers and cannot be easily removed.
Yes. Select text and apply highlights in multiple colors to mark key passages for review or reference.