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Robust PDF Reader and Annotator

Effortlessly view and annotate PDF documents with an array of convenient PDF reading and markup features.

A Delightful PDF Reading Experience

View Multiple PDFs in Tabs

UPDF allows you to open and view multiple PDF files in a tabbed format.

Page Layout Options

Easily adjust page views to fit your device screen.

Bookmark Management

Add bookmarks to navigate your PDF like a sailor!

Search and Find Text

Search for specific text in PDF when viewing a PDF document.

Annotate PDF with Ease

Add Comments to PDF

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

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.

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.

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.

Other Features of UPDF

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

Edit Text in PDF

Edit Image in PDF

Manage Pages

Convert PDF

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Supports macOS 10.14 or later


Supports Windows 7 or later



Supports iOS 14.0 or later


Supports Android 5.0 or later