Can you use CSS to mirror/flip text?

Question

You can use CSS transformations to achieve this. A horizontal flip would involve scaling the div like this:

-moz-transform: scale(-1, 1);
-webkit-transform: scale(-1, 1);
-o-transform: scale(-1, 1);
-ms-transform: scale(-1, 1);
transform: scale(-1, 1);

And a vertical flip would involve scaling the div like this:

-moz-transform: scale(1, -1);
-webkit-transform: scale(1, -1);
-o-transform: scale(1, -1);
-ms-transform: scale(1, -1);
transform: scale(1, -1);

---

DEMO:

span{ display: inline-block; margin:1em; } 
.flip_H{ transform: scale(-1, 1); color:red; }
.flip_V{ transform: scale(1, -1); color:green; }

<span class='flip_H'>Demo text &#9986;</span>
<span class='flip_V'>Demo text &#9986;</span>

-moz-transform: scale(-1, 1);
-webkit-transform: scale(-1, 1);
-o-transform: scale(-1, 1);
-ms-transform: scale(-1, 1);
transform: scale(-1, 1);

The two parameters are X axis, and Y axis, -1 will be a mirror, but you can scale to any size you like to suit your needs. Upside down and backwards would be (-1, -1).

If you're interested in the best option available for cross browser support back in 2011, see my older answer.

Real mirror:

.mirror{
    display: inline-block; 
    font-size: 30px;

    -webkit-transform: matrix(-1, 0, 0, 1, 0, 0);
    -moz-transform: matrix(-1, 0, 0, 1, 0, 0);
    -o-transform: matrix(-1, 0, 0, 1, 0, 0);
    transform: matrix(-1, 0, 0, 1, 0, 0);
}

<span class='mirror'>Mirror Text<span>

You can user either

.your-class{ 
      position:absolute; 
      -moz-transform: scaleX(-1); 
      -o-transform: scaleX(-1); 
      -webkit-transform: scaleX(-1); 
      transform: scaleX(-1); 
      filter: FlipH;  
}

or

 .your-class{ 
  position:absolute;
  transform: rotate(360deg) scaleX(-1);
}

Notice that setting position to absolute is very important! If you won't set it, you will need to set display: inline-block;

I cobbled together this solution by scouring the Internet including

• Stack Overflow answers,
• MSDN articles,
• http://css-tricks.com/almanac/properties/t/transform/,
• http://caniuse.com/#search=transform,
• http://browserhacks.com/, and
• http://www.useragentman.com/IETransformsTranslator/.

This solution seems to work in all browsers including IE6+, using scale(-1,1) (a proper mirror) and appropriate filter/-ms-filter properties when necessary (IE6-8):

/* Cross-browser mirroring of content. Note that CSS pre-processors
  like Less cough on the media hack. 

  Microsoft recommends using BasicImage as a more efficent/faster form of
  mirroring, instead of FlipH or some kind of Matrix scaling/transform.
  @see http://msdn.microsoft.com/en-us/library/ms532972%28v=vs.85%29.aspx
  @see http://msdn.microsoft.com/en-us/library/ms532992%28v=vs.85%29.aspx
*/

/* IE8 only via hack: necessary because IE9+ will also interpret -ms-filter,
  and mirroring something that's already mirrored results in no net change! */
@media \0screen {
  .mirror {
    -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(mirror=1)";
  }
}
.mirror {
  /* IE6 and 7 via hack */
  *filter: progid:DXImageTransform.Microsoft.BasicImage(mirror=1);
  /* Standards browsers, including IE9+ */
  -moz-transform: scale(-1,1);
  -ms-transform: scale(-1,1);
  -o-transform: scale(-1,1); /* Op 11.5 only */
  -webkit-transform: scale(-1,1);
  transform: scale(-1,1);
}

For cross browser compatibility create this class

.mirror-icon:before {
    -webkit-transform: scale(-1, 1);
    -moz-transform: scale(-1, 1);
    -ms-transform: scale(-1, 1);
    -o-transform: scale(-1, 1);
    transform: scale(-1, 1);
}

And add it to your icon class, i.e.

<i class="icon-search mirror-icon"></i>

to get a search icon with the handle on the left

There's also the rotateY for a real mirror one:

transform: rotateY(180deg);

Which, perhaps, is even more clear and understandable.

EDIT: Doesn't seem to work on Opera though… sadly. But it works fine on Firefox. I guess it might required to implicitly say that we are doing some kind of translate3d perhaps? Or something like that.