SumatraPDF

Free plan Windows

What SumatraPDF is

SumatraPDF is a free Windows application for reading PDFs, ebooks, and comics. It opens PDF, EPUB, MOBI, CBZ, CBR, DjVu, XPS, CHM, and common image formats. Listed PDF tasks include editing annotations, filling forms, signing, merging, splitting, extracting, and converting documents. The reader supports text-to-speech, screen readers through Windows UI Automation, and keyboard-only use. Users can change keyboard shortcuts, themes, and toolbar layout, and a portable edition can run without installation, including from a USB drive. SumatraPDF is listed for Windows 7, 8, 10, and 11, with 32-bit, 64-bit, and ARM64 builds. Its maker describes it as lightweight and using minimal memory. Documents and their names are not uploaded, while recently opened files are stored in a local settings file. With update checks enabled, the app contacts the maker’s server; official builds also send crash reports that may include fragments of an open document. It is Windows-only and has no OCR support.

Who it suits

SumatraPDF may suit Windows users who want a free reader for PDFs, ebooks, and comics, including users who need keyboard-only use or text-to-speech. Its portable version may also suit people who prefer running the app without installation.

What it does well

Opens PDFs, ebooks, comics, and image formats.
PDF tools include signing and form filling.
Portable version can run from a USB drive.
Supports screen readers and text-to-speech.

What to know first

Available only for Windows.
No OCR support.
Official builds send crash reports that may contain document fragments.

Limits

The free application has no listed quota or seat limit. OCR support is absent, and the application is limited to Windows.

Plans

Plan	Billed and limits	Price
Free	Windows application · free and open source · no ads or subscription	Free

As sumatrapdfreader.org lists them, read 3 Oct 2026. The maker's own page has the final word.

Getting started

Visit the SumatraPDF website.
Choose a Windows build for Windows 7, 8, 10, or 11, with 32-bit, 64-bit, and ARM64 builds listed.
Install the application, or use the portable version without installation, including from a USB drive.
Open a supported document and customize keyboard shortcuts, themes, or toolbar layout if desired.

Verdict

SumatraPDF covers a wide range of reading formats and PDF tasks at no cost. Its Windows-only availability and the stated crash-report behavior are worth considering before choosing it.

Questions

How much does SumatraPDF cost?

The listed plan is free. It is free and open source, with no ads or subscription.

Is there a free plan or trial?

SumatraPDF is free. A free trial is not offered.

Which platforms does it support?

It is a Windows desktop application, with builds listed for Windows 7, 8, 10, and 11. Mac and Linux are not supported.

Can it fill or annotate PDF forms?

Yes. Its documented PDF tools include annotation editing and form filling, as well as signing, merging, splitting, extraction, and conversion.

Does SumatraPDF support OCR?

No. OCR support is listed as none.

Does it upload documents?

The privacy policy says documents and their names are not uploaded. Recently opened files are kept in a local settings file; update checks contact the maker’s server, and official builds send crash reports that may include document fragments.

Facts from SumatraPDF's own pages

Accessibility: SumatraPDF supports screen readers through Windows UI Automation, built-in text-to-speech, and keyboard-only use. · sumatrapdfreader.org, 3 Oct 2026
Annotation tools: Yes · sumatrapdfreader.org, 24 Sept 2026
Command-line tools: The pre-release 3.7 documentation describes command-line tools to convert, extract, and search PDF and other files. · sumatrapdfreader.org, 3 Oct 2026
Customization: Users can customize keyboard shortcuts, themes, and toolbar layout. · sumatrapdfreader.org, 3 Oct 2026
Document privacy: The privacy policy says documents and their names are not uploaded, and recently opened files are kept in a local settings file. · sumatrapdfreader.org, 3 Oct 2026
Document tools: The documentation lists PDF tasks including annotation editing, form filling, signing, merging, splitting, extracting, and conversion. · sumatrapdfreader.org, 3 Oct 2026
Formats: It supports PDF, EPUB, MOBI, CBZ, CBR, DjVu, XPS, CHM, and common image formats. · sumatrapdfreader.org, 3 Oct 2026
Form filling: Yes · sumatrapdfreader.org, 24 Sept 2026
Free plan: Yes · sumatrapdfreader.org, 24 Sept 2026
Integrations: The documentation lists LaTeX integration and configurable external viewers, search, and translation services. · sumatrapdfreader.org, 3 Oct 2026
Lightweight: The product page describes SumatraPDF as lightweight and fast, with minimal memory use. · sumatrapdfreader.org, 3 Oct 2026
Network data: With update checks enabled, the app contacts the maker’s server; official builds also send crash reports that may include fragments of the open document. · sumatrapdfreader.org, 3 Oct 2026
Offline access: Yes · sumatrapdfreader.org, 24 Sept 2026
Platform limit: The product page states that SumatraPDF is Windows-only and is not available for Mac or Linux. · sumatrapdfreader.org, 3 Oct 2026
Platform support: desktop · sumatrapdfreader.org, 24 Sept 2026
Portable use: A portable version can run without installation, including from a USB drive. · sumatrapdfreader.org, 3 Oct 2026
Purpose: SumatraPDF is a free Windows reader for PDFs, ebooks, and comics. · sumatrapdfreader.org, 3 Oct 2026
Support: Users can report bugs through the issue tracker and ask questions or share feedback in the forum. · sumatrapdfreader.org, 3 Oct 2026
Text-to-speech: Yes · sumatrapdfreader.org, 24 Sept 2026
Windows builds: The site lists Windows 7, 8, 10, and 11 support, with 32-bit, 64-bit, and ARM64 builds. · sumatrapdfreader.org, 3 Oct 2026