On the words
Highlight, underline and strike follow the words of the page as you drag across them.
Annotate PDF
Highlight, draw and add notes and text to a PDF.
Import your PDF
PDF
Related tools
How to annotate a PDF
The video could not load. You can still follow the instructions below.
Drop your PDF, or select it.
Annotation
Text in any language
Type in a text box right on the page, in Czech, Arabic, Japanese or any other script.
Draw
A pen with smooth strokes, rectangles, ellipses, arrows and lines, each one moved, sized or deleted later.
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Still editable
The marks are real PDF annotations, so other PDF readers can show and change them. Turn on Flatten to make them part of the page.
Undo
Every mark, move and change can be undone and redone.
Frequently asked questions
How do I highlight text in a PDF?
Add your PDF, choose Highlight in the panel and drag across the words. Download the PDF when you are ready.
Can the marks be changed later?
Yes. They are saved as PDF annotations that other readers can edit. Turn on Flatten when they should become part of the page instead.
Can I write in my language?
Yes. Text boxes and notes take any script, and the saved file shows them in every PDF reader.
Are my files uploaded?
No. The files and what you write stay in your browser and never leave your device.
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Is it free?
Yes. No account, no usage limits, and no watermark.
Technical details
Processing
Each mark is written as a PDF annotation with its own appearance, in a background worker in your browser.
Fonts
Fonts for a script are loaded from this site the first time that script appears in a text box.
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Signed files
A digitally signed file is rewritten, so its signatures no longer verify.