Private online tool

Highlight PDF

Highlight a PDF by opening the document in Highlight mode and marking the areas that matter.

or drag and drop
Files stay on this device · Nothing is uploaded
Local processing No document uploads Free preview

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About this tool

How Highlight PDF works

Highlight a PDF by opening the document in Highlight mode and marking the areas that matter.

Create consistent visual highlights for review while keeping the source document on your device.

Step by step

  1. 1Choose a PDF; Highlight mode activates.
  2. 2Drag across the areas you want to emphasize.
  3. 3Review and download the highlighted PDF.

Common uses

  • Emphasize a clause
  • Mark study material
  • Call out report findings

Details and common questions

Which files are supported?

One PDF.

What result will I receive?

One PDF containing the changes you choose to make.

What should I know before using it?
  • Searchable-text selection requires embedded text.
  • Highlights are visual overlays.
  • Desktop sessions support up to 200 pages or 100 MB; mobile sessions support up to 100 pages or 30 MB.
Can I highlight a scanned PDF?

You can draw visual highlights, but selecting scanned text requires OCR.

Will overlapping highlights become darker?

The editor consolidates highlight marks to avoid unintended opacity stacking.