B4X

Convert a File's Character Encoding from UTF-8 to UFT-8-BOM

See more HTML-to-XML/Text Examples

To add a utf-8 BOM to a file is just a matter of prepending these 3 bytes to the file: 0xEF 0xBB 0xBF.

This may be difficult in some programming languages, or it may be trivial in either. Therefore, the Chilkat solution you see here might be helpful, or in a language such as C++, the Chilkat solution isn't really necessary because it's easy to do yourself.

B4X

Dim success As Boolean = False

'  This example assumes the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

Dim charset As ChilkatCharset
charset.Initialize

charset.FromCharset = "utf-8"
charset.ToCharset = "bom-utf-8"

success = charset.ConvertFile("qa_data/txt/helloWorld.txt", "qa_output/helloWorldBom.txt")
If success = False Then
    Log(charset.LastErrorText)
    Return
End If


Log("Success.")