Non unicode to Unicode conversion, for any font!

I have a html file with text encoded in a non-unicode font. I need to convert that file to unicode. I searched for a convertor. But, most of the convertors work for only a list of fonts, not for all fonts.

My font is very sp开发者_如何转开发ecific, text is in Devanagari script. I have the file, I have the font, now, please suggest me a tool or technique. Thanks.

Unicode is not about fonts, it is about encoding. You need to find a converter that can convert your text to Unicode. What is the encoding of your text?

Apache Tika has the ability to pull text from PDF files via knowledge of font behavior. So if the file is in fact a PDF you have a chance. If you have a text file full of font indices in no particular encoding, you have a big programming job ahead of you.