Put sticky-note comments on a PDF that Acrobat, Preview and browsers can read
Processed in your browser. Nothing is uploaded. Updated on 24 Oct 2026.Reviewing a contract, a draft or homework usually means comments in the margin. Tap where a remark belongs and a sticky-note icon is placed there with your text inside, and any highlight, box or arrow can carry its own comment too. They are saved as standard PDF comments, so the person you send the file to sees them in the comments list of Acrobat, Preview or a browser.
Drop the PDF on the page; Note is already chosen.
Tap where the comment belongs; a note icon appears and the cursor goes to the comment box.
Type the comment; tap any highlight or shape to give it a comment too.
Press Save PDF, then Download and send it back.
Reviewing a document means marking it: a highlight on the figure that is wrong, a circle round a missing signature, an arrow to the clause that matters, a note in the margin. Annotate PDF does all of that on the PDF itself, in your browser.
Seven tools. Highlight marks words like a highlighter pen. Pen draws freehand with a mouse, a finger or a stylus. Box, Ellipse, Arrow and Line draw neat shapes. Note places a sticky-note icon with your comment inside. Marks come in 6 colours and 4 line widths, and the colour starts on the usual choice for each tool: yellow highlights, red pen, blue boxes.
Real annotations. Every mark is saved as a standard PDF annotation with its own appearance, the way Acrobat stores comments. Acrobat, Apple Preview, Edge, Chrome and Firefox show them, list them as comments, and let the reader reply to, move or delete them. The original page content is never changed, so the text stays searchable. To fix the marks into the page instead, run the result through Flatten PDF.
The rest of the article, and all 6 questions about Annotate PDF, are on the Annotate PDF page.
Drop the PDF on this page and page 1 opens with Highlight chosen. Drag across words to highlight them, or pick Pen, Box, Ellipse, Arrow, Line or Note and draw. Tap any mark to give it a comment. Press Save PDF and Download; there is no sign-up, watermark or upload.
Yes. Every mark is written as a standard PDF annotation (Highlight, Ink, Square, Circle, Line or Text) with its own appearance, which is how Acrobat stores comments. Acrobat, Apple Preview, Microsoft Edge, Chrome and Firefox show them, list them as comments and let the reader reply to, move or delete them.
Seven: Highlight, Pen for freehand drawing, Box, Ellipse, Arrow, Line and Note for a sticky comment. Marks come in 6 colours and 4 line widths, and any mark can carry a written comment of up to 2,000 characters. Up to 500 marks can be saved in one file.
No. The pages are drawn and the annotations are written inside this page on your own device, so the document never reaches a server. PDFs up to 100 MB are accepted; a password-protected file asks for its password first, and the saved copy is read back to check it before you download it.
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