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Highlight PDF Online

Highlight important paragraphs, sentences, or regions in any PDF - yellow by default but pick any color (orange, green, pink, blue). Draw a highlight rectangle by clicking and dragging. Highlights are semi-transparent so the underlying text stays readable.

When to use this

Use for: reading study notes (highlight key passages of academic PDFs), legal review (mark critical contract clauses), reviewing reports (highlight findings), preparing PDFs for team review with color-coded callouts (red = problem, yellow = needs review, green = approved).

Frequently Asked Questions

Will my highlights be visible when I print?

Yes - highlights are stored as annotations and print along with the document by default. Some printers may render them slightly darker than on-screen. For a softer print version, use a lighter color (pale yellow) or reduce opacity in the highlight settings.

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Other targeted versions of this tool — each tuned for a specific use case.

Or use the main Edit PDF if your use case isn't covered above.