Highlight PDF Online Free Online Tool
Highlight important PDF content with a live freehand marker, adjustable colour, thickness and opacity.
Your file is processed in your browser and is not uploaded to our server.
What the Highlight PDF Online does
Highlight important PDF content with a live freehand marker, adjustable colour, thickness and opacity.
Highlight important PDF content with a visible marker while controlling colour, thickness and transparency. The Highlight PDF Online shows the document information or page controls needed for this PDF operation instead of adding a preview where it would not help.
When to use the Highlight PDF Online
- Emphasize clauses, instructions or key findings in a PDF.
- Create a highlighted study or revision copy of reading material.
- Use different marker colours to separate review themes.
How to use the Highlight PDF Online
- 1Choose a PDF and select the Highlight tool.
- 2Drag across important content, then adjust marker colour, thickness and opacity.
- 3Review every highlighted page and export the PDF.
Tips for the best Highlight PDF Online result
- Use highlights sparingly, keep the marked wording readable and choose a transparent colour that remains clear on screen and in print.
- Use only the options that affect your intended result.
- Review the completed output before publishing, printing or deleting the original.
Encrypted, digitally signed, damaged, extremely large or feature-heavy PDFs may have browser limitations. Keep the original and verify page order, text, forms, links and visual layout in the completed file.
Highlight PDF Online frequently asked questions
Is this Highlight PDF Online free to use?
Yes. The Highlight PDF Online is free to use and does not require registration or software installation.
Is my information or file kept private?
Yes. The included file tool processes the selected file locally in your browser instead of uploading it to this website.
Does this tool work on mobile devices?
Yes. The tool has a responsive interface and works in current mobile and desktop browsers with JavaScript enabled.
Can I directly change text that is already inside the PDF?
This browser editor adds new visual content. To replace existing wording, cover it with Whiteout and place new text above it. Whiteout is a visual cover and is not secure redaction for confidential information.
Which PDF editing features are included?
You can add text, images, signatures, freehand drawing, highlights, rectangles, circles, lines, arrows, whiteout and web links. You can also reorder, rotate, duplicate, delete and insert pages or another PDF.