SumatraPDF

Experience unparalleled performance with SumatraPDF, an open-source PDF viewer designed for maximum efficiency. The software's minimalist architecture eliminates bloat, resulting in exceptionally fast loading and rendering of documents. Completely free and portable, it runs directly from a single executable file—no installation or complex setup required. Ideal for students, professionals, and anyone seeking a no-fuss solution for viewing PDFs with optimal speed and reliability.