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Highlight PDF — Free Online
Highlight PDF lets you mark up lines and areas with a colour highlighter and add draggable sticky notes. It runs in your browser.
Open Highlight PDF tool →
✓ 100% free
✓ No sign-up
✓ No file upload
✓ Works in your browser
How to Highlight PDF
- 1Open the Highlight PDF tool and add your PDF.
- 2Choose Line or Area mode and pick a colour.
- 3Drag across the text to highlight, or place sticky notes.
- 4Download your marked-up PDF.
Open Highlight PDF tool →
Why use Highlight PDF?
Highlighting and notes make it easy to mark important parts and leave feedback when reviewing documents.
Common use cases
- Highlight key clauses in a contract.
- Mark answers while studying notes.
- Leave sticky-note feedback on a draft.
Tips
- Use Line mode for text and Area mode for blocks.
- Drag a note after placing it to fine-tune its position.
Frequently asked questions
How do I highlight text in a PDF?
Open the Highlight PDF tool, choose a colour, then drag across the text you want to highlight and download.
Can I add notes to a PDF?
Yes, switch to Note mode to drop draggable sticky notes anywhere on the page.
Is it free and private?
Yes, it is free and runs in your browser with no upload.