removeNonASCII Removes non-printable ASCII characters. Use String.prototype.replace() with a regular expression to remove non-printable ASCII characters. const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, ''); removeNonASCII('äÄçÇéÉêlorem-ipsumöÖÐþúÚ'); // 'lorem-ipsum'