Why you see empty boxes or question marks instead of Sinhala or Tamil
If your screen shows small empty boxes or question marks where Sinhala or Tamil should be, that is not the same problem as text showing up as English letters like jkpo;.
Boxes and question marks
This means the text is fine but the font being used doesn't have those letters. The fix is to change the font, not convert the text.
- In Word or another editor, select the text and choose a font that supports your language. For Sinhala, try Iskoola Pota or Nirmala UI. For Tamil, try Latha or Nirmala UI.
- On a website or in an app, update your device. Newer phones and computers include Sinhala and Tamil fonts by default.
- Noto Sans Sinhala and Noto Sans Tamil are free fonts from Google that cover both languages well.
English letters in place of Sinhala or Tamil
That is the old font problem. The file was typed in Bamini, STMZH or an FM font. Use the converters on the home page to turn it into real Unicode text.
Quick test
Paste the text into a plain Notepad window. If you still see boxes, it's a font problem. If you see English letters, it's a legacy font and needs converting.