Sumatra PDF is a free and open-source document viewer that supports many document formats including: Portable Document Format (PDF), Microsoft Compiled HTML Help (CHM), DjVu, EPUB, FictionBook (FB2), MOBI, PRC, Open XML Paper Specification (OpenXPS, OXPS, XPS), and Comic Book Archive file (CB7, CBR, CBT, CBZ). If Ghostscript is installed, it supports PostScript files. It is developed exclusively for Microsoft Windows.
Sumatra has a minimalist design, with its simplicity attained at the cost of extensive features. For rendering PDFs, it uses the MuPDF library.
Sumatra was designed for portable use, as it consists of one file with no external dependencies, making it usable from an external USB drive, needing no installation. This classifies it as a portable application to read PDF, XPS, DjVu, CHM, eBooks (ePub, FictionBook, Mobi PDB and TCR), Comic Book (CBZ, CBR, CBT, and CB7) and image formats (BMP, GIF, JPEG, JPEG 2000, JPEG XR, PNG, TGA, and WebP). Sumatra can also support PostScript, PJL, and HEIF formats via external software.
What is SumatraPDF?
SumatraPDF by Krzysztof Kowalczyk is open-source Windows software in the e-book readers category. It ranks 2nd by popularity among e-book readers in this catalogue. The first release dates back to 2006. It is written in C++ and C.
Installation and requirements
The publisher provides EXE and Portable installers for 64-bit, ARM64 and 32-bit Windows. The main installer is 11.1 MB. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 3.6.1, released on April 6, 2026. The version history goes back to March 15, 2020: 14 releases, all linked to the official files. That is about 2.3 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 2,982,125 times. The source code on GitHub (sumatrapdfreader/sumatrapdf) has 17,830 stars. Wikipedia has an article about it in 24 of our languages. On Windows it registers 18 file types, including .pdf, .epub, .cbr, .cbz and .mobi. Similar programs include calibre, Sigil and Kindle Comic Converter.
Project description on GitHub: “SumatraPDF reader”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Small download (11.1 MB)
- Large user base
- Mature project (since 2006)
Cons
- Installation needs administrator rights
In short: SumatraPDF is an open-source e-book reader tool for 64-bit, ARM64 and 32-bit PCs. Administrators can deploy it unattended.
Screenshots
Is SumatraPDF safe to download?
- The file is served by sumatrapdfreader.org, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
1EEE71CCCD2EA6E94D5BCEA54EE2F759844DA3E1A0EE2F6045035B1D17B94381· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Security practices (OpenSSF Scorecard)
Automated checks of the sumatrapdfreader/sumatrapdf repository on GitHub by the Open Source Security Foundation, last run on October 19, 2026.
- Security policy10
- No dangerous workflows10
- Actively maintained10
- Static code analysis10
- Licence declared10
- Fuzzing10
- Restricted token permissions9
- Pinned dependencies6
- No binaries in the repository4
- Code review0
- OpenSSF Best Practices badge0
- Branch protection0
The score rates how the project is developed and released, not whether the program is safe to install. scorecard.dev
Recent versions
All 14 versions ›14 versions over 6 years · about 2.3 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 3.6.1Latest | April 6, 2026 | 11.1 MB | 32-bit EXEARM64 EXE64-bit Portable64-bit EXE |
| 3.6 | March 17, 2026 | 11.0 MB | 32-bit EXE32-bit EXE64-bit EXE64-bit Portable |
| 3.5.2 | October 25, 2023 | 8.2 MB | 32-bit EXE64-bit PortableARM64 EXE32-bit EXE |
| 3.5.1 | October 24, 2023 | 8.2 MB | 64-bit EXEARM64 EXE64-bit EXE32-bit EXE |
| 3.5 | October 23, 2023 | 8.3 MB | ARM64 EXE64-bit EXE32-bit EXEARM64 EXE |
| 3.4.6 | June 8, 2022 | 7.5 MB | 32-bit EXE32-bit EXE64-bit EXE64-bit EXE |
| 3.4.5 | June 5, 2022 | 7.5 MB | 64-bit EXE64-bit EXE32-bit EXE32-bit EXE |
| 3.4.4 | June 2, 2022 | 7.5 MB | 32-bit EXE64-bit EXE32-bit EXE64-bit EXE |
Install from the command line
Silent install ›winget install --id SumatraPDF.SumatraPDF -echoco install sumatrapdf.install -yscoop install extras/sumatrapdfSumatraPDF-3.6.1-64-install.exe -sProgram files (.exe): sumatrapdf.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Krzysztof Kowalczyk
- Category
- E-book readers
- Licence
- GPL-3.0
- Price
- Free
- Source code
- github.com/sumatrapdfreader/sumatrapdf
- Written in
- C++ and C
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- EXE, Portable
- Version
- 3.6.1
- Released
- April 6, 2026
- First release
- 2006
- Added to the catalogue
- March 30, 2021
- Versions listed
- 14
- Updates / year
- 2.3
- Chocolatey downloads
- 2,982,125
- GitHub stars
- 17,830
- GitHub forks
- 2,066
- Website
- github.com
- winget ID
- SumatraPDF.SumatraPDF
- Chocolatey package
- sumatrapdf.install
- Scoop package
- extras/sumatrapdf
File types it opens (18)
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is SumatraPDF free?
Yes. SumatraPDF is open-source software under the GPL-3.0 licence.
Is SumatraPDF safe to download?
The download comes from sumatrapdfreader.org, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install SumatraPDF with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can SumatraPDF be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does SumatraPDF run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of SumatraPDF?
The versions page lists all 14 versions with links to their official installer files, back to March 15, 2020.
Can I use SumatraPDF without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to SumatraPDF?
calibre, Sigil, Kindle Comic Converter, BlueGriffon and YACReader. The alternatives page compares them.
