Highlight a PDF online, free
Highlight areas of a PDF by placing a transparent colored rectangle anywhere on a page. This is a visual overlay, not text-selection highlighting.
Files are processed locally in your browser and are not uploaded to a server. No account, no watermark, no tracking.
How to use it
- Open the editor and choose a PDF.
- Open Enhance and choose Highlight.
- Place and resize the highlight over any area.
- Download the PDF.
Good to know
- Highlight is a placed transparent rectangle, not true text-selection highlighting.
- It is a visual annotation created by you.
Privacy & honesty
Your documents stay on your device — LocalSign has no servers that receive your files. Signatures, stamps, highlights, shapes, and other annotations are visual changes created by you. LocalSign does not verify, certify, notarize, or legally validate documents.