Yes. Sumatra PDF is completely free and open source, with no ads or bundled software.

What file formats does Sumatra PDF support?

Sumatra PDF supports PDF, EPUB, MOBI, CBZ, CBR, DjVu, XPS, CHM, and common image formats.

Is Sumatra PDF available for Mac or Linux?

Sumatra PDF is a Windows application. It is not available for macOS or Linux.

Sumatra PDF

Free PDF, eBook (epub, mobi), comic book (cbz/cbr), DjVu, XPS, CHM, image viewer for Windows.

Fast, small, packed with features, customizable.

Latest release: 3.6.1

latest pre-release: 3.7

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Why Sumatra PDF?

Lightweight and fast — opens documents instantly with minimal memory use
Free and open source — no ads, no bundled software, no subscription
Many formats — PDF, EPUB, MOBI, comic books (CBZ/CBR), DjVu, XPS, CHM, and images
Portable option — run without installation from a USB drive
Highly customizable — keyboard shortcuts, themes, and toolbar layout
Windows 7, 8, 10 and 11 — native Windows application, 32-bit, 64-bit, and ARM64 builds

Everyone loves SumatraPDF

@Merjia_

SumatraPDF is one of those amazing open source programs that does everything a closed-source and/or commercial product does, but better in every way.

@EnercoConseils

"PDF readers have, over the years, managed to earn themselves something of a reputation for being slow, lumbering beasts – thanks largely to Adobe Reader. Sumatra PDF bucks the trend. It is small, svelte, lightweight and lightning fast."

@r0x12ul

I was tired of using slow loading & bloated Adobe pdf-reader.
I found SumatraPDF. I'm happily using the portable application.
Thanks to its simple user interface, small memory footprint & fast startup.

@ronaldnzimora

The best PDF reader I have used since I started reading PDFs in 1998 is SumatraPDF.

Lightweight, fast loading, minimal resource hogging.

@CRTejaswi

SumatraPDF v3.4 is the bomb! What a great piece of software by @kjk . The custom-keybindings work like a charm!

I like SumatraPDF. Runs the circles in terms of performance around the sad piece of crap that Adobe PDF Reader has become.

burntoutfire

If your Adobe reader croaks or feels glitchy while scrolling, try Sumatra PDF instead. It will be almost like opening a plain text document. Plus you can easily highlight text.

eksith

I love Sumatra PDF, thank you for making it.

r4vik

I won't need to buy a PDF reader ever again, now that I have SumatraPDF

barrysteve

I'm a big fan of SumatraPDF and use it everywhere I can.

tripzilch

I am pretty happy with SumatraPDF on Windows. Orders of magnitude faster than Reader too.

pav3l

Sumatra PDF is the best.

tehwalrus

I like Sumatra PDF. It's speedy, lightweight, and gets the job done.

joshuapants

I used to use Foxit, but have since turned to SumatraPDF. It seems to be a little lighter weight than Foxit.

stcredzero

Frequently asked questions

Is Sumatra PDF free?: Yes. Sumatra PDF is completely free and open source, with no ads or bundled software.
What file formats does Sumatra PDF support?: PDF, EPUB, MOBI, CBZ, CBR, DjVu, XPS, CHM, and common image formats. See the supported formats page for details.
Is Sumatra PDF available for Mac or Linux?: No — Sumatra PDF is a Windows-only application. See why only Windows for more information.
How does Sumatra PDF compare to Adobe Acrobat Reader?: Sumatra PDF is much smaller and faster. Ideal if you want a lightweight alternative without bloat.