

SumatraPDF
This free, open-source viewer for Windows supports multiple formats like PDF, eBooks (ePub, Mobi), CHM, and Comic Books (CBZ, CBR). Prioritizing simplicity and speed, it offers a lightweight, portable design with a minimalist interface, catering to users seeking fast and efficient document viewing.
Features
Properties
- Lightweight
- Optimal performance
- Privacy focused
Features
- Low memory usage
- Ad-free
- Tabbed interface
- Portable
- Multi Format Reader
- No registration required
- Works Offline
- Highlighter
- Global bookmarks
- PDF annotation
- Dark Mode
- Quick search
- Full-Text Search
- AzW Reader
- XOD File Reader
- OXPS File Reader
- PRC File Reader
- No Tracking
- Text to Speech
- OCR
Export to office formats
- Data portability
SumatraPDF News & Activities
Recent News
- Maoholguin published news article about SumatraPDF
Sumatra PDF Reader 3.5 unveiled: features dark mode, ARM 64-bit support, and moreThe open-source PDF reader for Microsoft Windows, SumatraPDF Reader 3.5, has been unveiled with mul...
Recent activities
OperandOps added SumatraPDF as alternative to MorphPDF
victorAtSilentEditor added SumatraPDF as alternative to Silent Editor- pierceddvampp liked SumatraPDF
- Oopsies reviewed SumatraPDF
Too minimalistic to be useful. No page thumbnails. No font changing. Dark theme is glitchy. Main menu is hidden in a tiny hamburger button.
Basically, if all you need is a quick preview, Sumatra is fine. For actual reading and navigation, no.
- holybreadman liked SumatraPDF
- varsh-codes reviewed SumatraPDF
I’ve tried numerous browser extensions and "heavy" PDF software to find a comfortable night-reading setup, but nothing comes close to Sumatra PDF.
What makes it stand out is its incredible speed and tiny disk size (under 20MB). Unlike other readers that just "theme" the menu bars, Sumatra allows for a true color inversion of the document itself. By using the simple i shortcut or customizing the Advanced Options file, I was able to get pure white text on a pitch-black background, which is...
DevSoftwareMail added SumatraPDF as alternative to PDF Reader - Editor, Scan & TTS- Nevenkebla liked SumatraPDF
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What is SumatraPDF?
Sumatra PDF is a free PDF, eBook (ePub, Mobi), FB2, XPS, DjVu, CHM, Comic Book (CBZ and CBR) viewer for Windows.
Sumatra PDF is powerful, small, portable and starts up very fast.
Simplicity of the user interface has a high priority.







Comments and Reviews
Even when it may have a somewhat unpleasant aesthetic, it is fast and very light. This marvel is an essential part of the Freeware / OpenSource suite of applications that I always install and use on my PC.
Do yourself a favor, forget about other programs like Adobe Reader, etc.
Good for looking at a PDF quickly, but anything more and SumatraPDF just lacks very basic features, like filling forms.
Honestly, this just makes it useless for real use, because it would mean keeping two different pdf readers installed just in case you encounter forms.
Too minimalistic to be useful. No page thumbnails. No font changing. Dark theme is glitchy. Main menu is hidden in a tiny hamburger button.
Basically, if all you need is a quick preview, Sumatra is fine. For actual reading and navigation, no.
I’ve tried numerous browser extensions and "heavy" PDF software to find a comfortable night-reading setup, but nothing comes close to Sumatra PDF.
What makes it stand out is its incredible speed and tiny disk size (under 20MB). Unlike other readers that just "theme" the menu bars, Sumatra allows for a true color inversion of the document itself. By using the simple i shortcut or customizing the Advanced Options file, I was able to get pure white text on a pitch-black background, which is perfect for late-night reading without eye strain.
The level of customization is impressive for such a minimalist app. I was able to set a Default Zoom (Fit Width) and hide all toolbars for a distraction-free, full-screen experience. If you want a reader that is lightning-fast, free, and actually respects your system resources, this is it.
It is light and spunky. However, I couldn't figure out how to see/hide layers and set a specific zoom (example: 37.5%). I use a projector for cutting out patterns so I need to have very good control over the zoom levels.
Lightweight, fast, non-cluttery UI and has all the basic functionality to read a PDF. I think it's more than enough for 90% of people
very nice, but often when opening a file, open last open pdf in background.