free pdf reader and annotator

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 pdf

View Multiple PDFs in Tabs

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

pay layouts

Page Layout Options

Easily adjust page views to fit your device screen.

add bookmark to pdf

Bookmark Management

Add bookmarks to navigate your PDF like a sailor!

search in pdf

Search and Find Text

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

view multiple pdfs
view pdf pages
add bookmarks to pdf
search text in pdf

Annotate PDF with Ease

Add Comments to PDF

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

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

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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