When you upload a font file with a .woff, .woff2, .otf, or .ttf suffix to this webpage, it is temporarily stored in your browser’s memory. The font is then loaded using a style element or the ‘FontFace’ api, which is a feature that allows custom fonts to be loaded dynamically into the page.
Once the font is successfully uploaded and recognized, it is added to the browser’s list of available fonts and applied to the text within the input area. The font is applied through its name, and the corresponding variable-font properties such as weight, width, optical size, and slant are configured by the user through the interactive sliders.
The font file is stored in the browser’s memory while it is active. This memory storage is temporary and is deleted as soon as the page is reloaded or closed. In other words, the font file never leaves the browser, but remains available only for the duration of the session (i.e., as long as the page is open). If the page is refreshed, the font must be re-uploaded.
This dynamic and interactive approach gives users the flexibility to experiment with fonts and see how different styles and settings look in real-time.