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:

read pdf

Read PDF

edit pdf

Edit PDF

organize pdf

Organize PDF

convert pdf

Convert PDF

Ocr pdf


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updf for macos


Supports macOS 10.14.6 or later

Download from Mac App Store FREE DOWNLOAD
updf for windows


Supports Windows 7 or later

updf for ios


Supports iOS 14.0 or later

updf for android


Supports Android 5.0 or later