A PDF reader is a piece of software that allows you to open .pdf files. Modern OS’ usually come with built-in options to show .pdf files, but a dedicated reader will often come with a number of advantages over the built-in option.
With .pdf being the most popular document format, there is no shortage of readers but if you’re looking for a clean, simple, free and open source reader that supports dark mode you should take a look at NightPDF.
NightPDF is built using Electron and PDF.js, and macOS and Windows users can download it from Github.
