The web browser is the most widely used app on the planet, and there are several open-source takes on the application that you should consider as your default.

Simply go to the tool’s page and enter your website URL. After a short measurement, you’ll receive a page performance report.

There’s also an open-source utility for the job that I’ve been using constantly: Pandoc. Pandoc calls itself "a universal document converter," with support for dozens of markup formats and document ...