Annotate PDFs with UPDF to Collaborate on a Better Scale

Effortlessly annotate PDF documents with an array of convenient PDF markup tools and collaborate with other users to review your PDFs thoroughly.

free pdf reader and annotator

Annotate PDFs with Ease

Add Comments to PDF

Make comments in PDF documents, highlight, underline, or strikeout text, add text boxes and sticky notes.

annotate pdf

Add Stamps and Stickers to PDF

Add up to 100+ different kinds of stamps and stickers to your PDF. You can even create a custom stamp to any section of the document.

annotate pdf

Add Signatures to PDF

Draw a handwritten signature or type-in an electronic signature. Signatures can be easily moved to any section of the document.

annotate pdf

Insert Shapes in PDF

Insert various shapes into your PDF, such as rectangles, ovals, arrows, and lines. Control the properties of these shapes by changing their style, thickness, border and fill colors, and opacity.

draw on a pdf

Other Features of UPDF

UPDF is an all-in-one PDF solution - here are some other great features:

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Supports macOS 10.14.6 or later Download from Mac App Store



Supports Windows 7 or later



Supports iOS 14.0 or later



Supports Android 6.0 or later