FitText.js, a jQuery plugin for inflating web type

FitText makes font-sizes flexible. Use this plugin on your responsive design to achieve scalable headlines that fill the width of the parent element.

How it works

Here is a simple FitText setup:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="jquery.fittext.js"></script>
<script>
  $("#responsive_headline").fitText();
</script>

Pretty Cool. Your text should now resize based on the width of the parent element. By default: Font-size = 1/10th of the parent element's width.

The Compressor

If your text is resizing poorly, you'll want to turn tweak up/down "The Compressor". It works a little like a guitar amp. The default is 1.

$("#responsive_headline").fitText(1.2); // Turn the compressor up   (text shrinks more aggressively)
$("#responsive_headline").fitText(0.8); // Turn the compressor down (text shrinks less aggressively)

This will hopefully give you a level of "control" that might not be pixel perfect, but scales smoothly & nicely.

new: minFontSize & maxFontSize

FitText now allows you to specify two optional pixel values: minFontSize and maxFontSize. Great for situations when you want responsive text but also need to preserve hierarchy.

$("#responsive_headline").fitText(1.2, { minFontSize: '20px', maxFontSize: '40px' })

new: minWidth & max Width

FitText now allows two optional window width pixel values: minWidth and maxWidth. Useful for responsive design scenarios when FitText should only be used at certain window sizes.

// Will only invoke FitText if window width >= 480px
$("#responsive_headline").fitText(1.2, {minWidth:480});

CSS Tips

• Make sure your headline is display: block; or display: inline-block; with a specified width, i.e. width: 100%.
• Be ready to tweak till everything balances out.
• FitText now ignores your CSS file's font-size, but be sure to set one as a non-javascript fallback.

Changelog

• v 1.2 = FitText allows minWidth and maxWidth options to enable/disable for certain window widths
• v 1.1 - FitText now ignores font-size and has minFontSize & maxFontSize options
• v 1.0.1 - Fix for broken font-size.
• v 1.0 - Initial Release

Disclaimers

This is the part of the show where we cover our butts.

Intended for Fluid Width Designs

We built this to satisfy a need for fluid resizing text on responsive designs. Mostly for use on Trent Walton's blog, which he's using it all over.

If you want more exact fitting text, there's a plugin for that! We recommend checking out BigText by Zach Leatherman.

window.resize() tsk tsk tsk...

If you oppose window.resize(), it's worth mentioning that @chriscoyier created a fork of FitText using a debounced resize method.

Download, Fork, Commit.

If you think you can make this better, please Download, Fork, & Commit. We'd love your see your ideas.