Remove non ASCII characters from a JavaScript string

If you're converting text from a different character set to ASCII, you might end up with characters that are not ASCII compatible. These characters can cause issues when processing or displaying text.

In order to remove them, you can use a regular expression to match all non-ASCII characters and replace them with an empty string. The regular expression [^\x20-\x7E] matches all characters outside the range of printable ASCII characters (from space to tilde). Then, using String.prototype.replace(), you can remove all matches from the string.

const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '');

removeNonASCII('äÄçÇéÉêlorem-ipsumöÖÐþúÚ'); // 'lorem-ipsum'