Highlight and comment on a PDF
Mark up a PDF the way you would on paper: highlights, notes, arrows and stamps, as standard annotations any reader shows.
or drop it anywhere
How to highlight and comment on a PDF
Open your PDF
Pick it or drop it here.
Mark it up
Drag across words to highlight them, or choose a note, shape, arrow or pen.
Save
Your marks are saved as standard annotations.
Annotate PDF in your browser
Highlights, underlines, strike-throughs, notes, text boxes, shapes, arrows, freehand ink and stamps such as APPROVED, PAID and DRAFT are saved as standard PDF annotations. They show in Adobe Reader, browsers, Preview and every other PDF reader, kept apart from the page's own content.
The All comments page lists every comment and mark in the file, so a reviewed document can be worked through one note at a time.
Why use OnePDF to highlight and comment on a PDF
Text marks
Highlight, underline, strike through or squiggle words, in any colour.
Notes and text boxes
Pin a comment to a spot, or write in a box on the page.
Shapes, arrows and ink
Boxes, circles, lines, arrows, polygons and freehand drawing.
Stamps
APPROVED, PAID, DRAFT and more, sized to the box you draw.
Questions about Annotate PDF
Will others see my highlights and comments?
Yes. They are standard PDF annotations, shown by Adobe Reader, browsers, Preview and every other reader.
Can I see all comments in one place?
Yes. The All comments page lists every comment and mark in the file.
Is my PDF uploaded?
Not unless you sign in. Signed out, your file is opened by OnePDF inside your browser, on your own device, and is not uploaded to any server. Signed in with a TensorActivity account, the files you open are also saved to your account, encrypted, so they are there on every device you sign in to.