With this demo, you can supply an Input string and see the combinations that are confusable with it, using data collected by the Unicode consortium. You can also try different restrictions, using characters valid in different approaches to international domain names.

The descriptions of the signs mostly follow Gardiner's publications. However, an attempt was made to achieve a greater consistency.

Spotify supports unicode usernames which we are a bit proud of (not many services allow you to have ☃, the unicode snowman, as a username). However, it has also been a reliable source of pain over the years. This is the story of one time when it bit us pretty badly and how we spent Easter dealing with it.

So what characters can you count on nearly everyone being able to see? To answer this question, I looked at the characters in the intersection of several common fonts: Verdana, Georgia, Times New Roman, Arial, Courier New, and Droid Sans. My thought was that this would make a very conservative set of characters. There are 585 characters supported by all the fonts listed above. Most of the characters with code points up to U+01FF are included. This range includes the code blocks for Basic Latin, Latin-1 Supplement, Latin Extended-A, and some of Latin Extended-B. The rest of the characters in the intersection are Greek and Cyrillic letters and a few scattered symbols. Flat, natural, sharp, and gradient didn’t make the cut.

Draw something in the left box! And let shapecatcher help you to find the most similar unicode characters! Currently, there are 11817 unicode character glyphs in the database. Japanese, Korean and Chinese characters are currently not supported.