How to Highlight and Annotate a PDF Online for Free

Mark up study notes, contracts and reports with highlights, drawings and comments, in any colour.

Highlight text

Open your PDF in the free PDF editor.
Select Highlight.
Pick a colour in the bar above the page: yellow, green, pink, blue, orange or purple, or any custom colour.
Drag across the text you want to mark. Highlights are see-through, so the text stays readable.

Select Draw / Sign, choose a pen colour and thickness, and drag to underline, circle or point at content. The white pen can cover small marks.

Select Add text, tap next to the content and type your note. Press Enter for new lines and drag the note anywhere on the page.

Use Undo and Redo at any time. When you're done, select Download PDF to save the annotated file.

Try it now. It's free.

No sign-up, no watermark, and your file never leaves your device.

How do I highlight text in a PDF for free?

Open the PDF, choose Highlight, pick a colour and drag across the text, then download the PDF.

Can I change the highlight colour?

Yes. When Highlight is selected, a bar above the page lets you choose from six colours or pick any custom colour.