DK Technical Mate
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Highlight, Underline and Strike Out Text in a PDF

Annotate PDFs online: select text to highlight, underline or strike it out, or put a highlight box over any area. Handy for study notes and reviews.

or drag and drop your PDF here

No login · up to 50 MB · deleted after 2 hours

How it works

When you study notes or review a document, the important lines should stand out. Pick a style from the Annotate menu, select the text, and the mark is added.

Step by step

  1. Upload the PDF.
  2. Choose Highlight, Underline or Strike in "Annotate".
  3. Select the text with your mouse or finger.
  4. Press "Apply changes" and download.

Real annotations

Marks are saved as PDF annotations, so other PDF readers show them too.

Recolour or remove

Change the colour of an existing highlight or delete it.

Box highlights

Highlight a table, chart or picture with a box.

Good for

  • Mark key points in exam notes
  • Flag a clause in an agreement
  • Strike out a mistake to show the correction

Questions and answers

Does it work on scanned PDFs?+

Text cannot be selected on a scan, so use the highlight box, which works on any area.