Small JavaScript Library For Text Auto Resizing – textFit
textFit is a standalone JavaScript library that automatically and dynamically scales text to fit inside a fixed width container.
JavaScript & CSS text resize
Responsive Text Resize Library – font-size.css
A tiny CSS utility library that simplifies the process of scaling the font-size CSS property. It allows you to increase or decrease the text size when viewed on various browsers, screen sizes, and mobile devices.
Scale Text Element Relative To Its Parent Container – Textblock
The Textblock JavaScript library dynamically adjusts the font size, font weight, and line-height to fit text within its parent container when resizing.
Minimal Text Resizing JavaScript Library – fitty
fitty is a small, zero-dependency JavaScript library that dynamically scales the text to fill its parent container.
Resize Text Fonts Based On The Screen Width – font-master
Just another text resize library written in pure JavaScript that dynamically scales font sizes of your text to fit the parent container.