Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.
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Top PDF-VIEWER GitHub Repositories & Tools (2026)
Discover the most starred and trending open source tools tagged with #pdf-viewer.
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5 matching projects · updated Sep 29, 2026
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↑ +4 today
A toolkit for ebooks, audiobooks and comics written in Swift
↑ +1 today
A Fast, Cross-Platform Pdf Reader
↑ +1 today
PDF Rendering and Viewing API in Java
↑ +1 today
PDF4QT is an open-source PDF toolkit for Windows and Linux, combining powerful desktop applications, command-line tools and a modern MIT-licensed C++/Qt PDF engine.
↑ +1 today
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