Libbraille was a Portable Library for Braille Displays which was a free online tool translator. It translated Unicode text to Braille however now it is offline and not available online for users. An alternative for the translator can be,

The translator is a simple way to allow one to convert any text to Braille. It can support all contractions up to the grade 2 level.

The procedure is first to enter the text and then choose the language from the options available. You can also check the advanced options available on the web page. 1 or 2 can be chosen for uncontracted and contracted Braille options respectively.