- Process audio and video
FFmpeg
The industry-standard, complete, cross-platform solution to record, convert, and stream audio and video.
FFmpeg
- Learn Japanese
- Start writing
- Manage TODO lists
- Bookmark links, notes and images
- Manage academic research resources
- Connect your notes
- Manage your clipboard
- Build personal knowledge network
- Transform data
- Process PDF files
- Edit PDF files
- Get information about any emoji
- Read PDF files
- Toggle dark mode
Sumatra PDF
Lightning-fast PDF reader that respects your system resources
A lightweight PDF reader for Windows that opens documents instantly. It handles not only PDFs but also EPUB, MOBI, XPS, DjVu, CHM, and comic book formats with minimal interface.
What we love ❤️
- Lightning fast - opens even large PDFs instantly
- Extremely light on system resources
- Clean interface without any distractions
- Completely free and open source
- Supports multiple document formats out of the box
Worth noting 💡
- Windows only - no Mac or Linux version
- Basic PDF editing features are not included
- Some users might find the interface too minimal
- No cloud integration or advanced annotation features
SumatraPDF shows what happens when you focus purely on reading performance. While other PDF readers have become bloated with features, this one maintains its focus on being fast and lightweight. It's a perfect example of how sometimes less is more - especially when you just want to read documents quickly.