Yes you can convert your PDF document created in non-unicode font to Unicode document. I usually follow these two methods - Method-1 Convert your PDF document into MS word (editable) format with the help of SmallPDF citation target s title PDF to Word Converter - 1% Free index 1 unique_id MzzAn or Zamzar online converters. After converting it copy the from the document and change it to Unicode with any Tamil Unicode font converter available online. Just google it. Method-2 (This is my favorite method.) Use any online OCR citation target s title Free Online OCR - Convert JPEG PNG GIF BMP TIFF PDF DjVu to Text index 2 unique_id simWx Service upload your PDF documentSelect LanguageConfirm preview hit OCR button. You have done just copy the past it into MS word and save it. Congratulations! If I could help you please upvote the answerud83dude4f