Font Tester

Font Tester is a browser extension for previewing and comparing typefaces on live webpages. It is aimed at people deciding whether a font fits a website or brand, and it centers on real-time testing rather than switching between separate design tools and font pages. The page describes it as a way to pick fonts that affect how information and branding are perceived.

Its main features include live preview on any webpage, a pre-installed library of 1,500+ Google Fonts, and support for custom fonts that can be uploaded and previewed locally. It also offers Live Compare for previewing multiple fonts at once, finding the font family used on a webpage, generating and copying CSS code, filtering fonts by family, adjusting font size and colors, and changing letter spacing and underline spacing. Dark mode is also listed. The page says custom fonts stay on the local machine and are not uploaded to the cloud.

Font Tester is delivered as a browser extension and is currently available for Chromium-based browsers such as Chrome and Edge. The page says it will soon be available for Firefox and Safari, and that those add-ons will be available for premium users when released. It is free to use with simple features, while pro features are unlocked with a lifetime license. The pricing section also says the paid version includes commercial use, activation on up to three devices, free updates, and upcoming features such as adding to a collection. The page also mentions open-source development and bulk discounts for 10 or more licenses.