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SumatraPDF

Free#4 of 23 in PDF ReadersFile Viewer Software File Reader Software

SumatraPDF: A portable Windows reader with broad format support, annotations, signatures, and command-line tools. Ranked #4 of 23 in PDF Readers by our editors (9.0/10); pricing: Free plan; best for portable Windows reading with signatures.

9.0/10Editor score

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SumatraPDF9.0 Visit SumatraPDF

At a glance

Editor score
9.0 / 10
Pricing
Free plan
Best for
Portable Windows reading with signatures
Free plan
Yes
Paid from
Free
Offline access
Yes
Facts checked
24 Sep 2026

Where it wins
- Opens PDFs, ebooks, comics, images, and several document formats
- Supports annotations, digital signatures, and Windows text-to-speech
- Portable deployment and command-line PDF operations support local workflows
Where it doesn't
- Windows-only, with no macOS, Linux, web, or mobile versions
- Cannot fill PDF forms, despite supporting form-field highlighting
- Scanned pages require OCR elsewhere

Our verdict on SumatraPDF

SumatraPDF is a free, open-source desktop reader for Windows. It is aimed at people who want to read PDFs and a broad set of other local formats, including EPUB, MOBI, CBZ, DjVu, XPS, CHM, and image files. Text search, document navigation, printing, customizable keyboard shortcuts, and themes support everyday reading, while portable deployment allows the application to run as a self-contained executable. It is a focused choice for Windows users who value local access and a lightweight document workflow.

Its feature depth is strongest in reading, annotation, signatures, and accessibility. The annotation set includes highlights, underlines, strikeouts, squiggly underlines, free text, stamps, carets, images, and ink. Digital signatures can use Windows certificates or PFX/P12 files. Read Aloud works with Windows text-to-speech, and the published feature set also includes AI chat with documents as a pre-release feature. These capabilities make SumatraPDF useful for reviewing and signing documents, although it cannot fill PDF forms and does not provide OCR for scanned pages.

SumatraPDF also fits workflows that benefit from portable and command-line operation. Its command-line tools support PDF conversion, extraction, merging, page operations, and search, extending the reader beyond an interactive desktop interface. The trade-off is platform scope: the official availability is Windows-only, with no macOS, Linux, web, or mobile versions. Choose SumatraPDF for free local reading, broad format coverage, annotations, signatures, and automation on Windows. Choose another reader if form filling, OCR, or access across non-Windows platforms is central to the workflow.

Your product? Our editors can test SumatraPDF in depth and publish a review, labelled as paid · from $149/mo →

SumatraPDF pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on sumatrapdfreader.org

SumatraPDF fact sheet

Free plan	Yes
Paid from	Free
Annotation tools	Yes
OCR support	Not verified
Form filling	Yes
Offline access	Yes
Text-to-speech	Yes
Platform support	Desktop
Deployment	Desktop
Platforms	Windows
Support	Docs, Community
Built for	Solo, Small business, Mid-market (editorial estimate)
Pricing	Free plan
Website	sumatrapdfreader.org
Facts checked	24 Sep 2026

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SumatraPDF vs the competition

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Also Ranked In

SumatraPDF is ranked in 3 of our directories.

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used SumatraPDF for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

SumatraPDF is listed in our PDF Readers directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update