A free online tool to encode utf8 characters by using this tool
If you're executing cross-browser testing, a UTF8 encoder may be helpful. It can be used, for example, to create test data to validate the validity of data or to test input forms. There are a number of security checks that you might be able to get around if the input form has weak UTF8 validation. An UTF8 encoder may also be used to determine the number of bytes in the incoming data. For instance, homoglyphs, which appear to be ordinary characters but are actually similar-looking Unicode characters, might appear in text. You may determine the number of bytes each character is made up of by encoding your data. To determine how many bytes the input requires, you may also use a UTF8 encoder.