FontPlop

FontPlop is a free, private font viewer and tester that runs entirely in your browser. Drop in a TTF, OTF, WOFF or WOFF2 file to see every glyph with its Unicode code, test text in a waterfall view, explore OpenType features and variable font axes (with ready-to-copy CSS), check supported languages, naming and license info, and run quick font QA in the Metrics & checks tab. Your file never leaves your browser. No sign-up required.