You enter text in SAMPA format, and it gives you it back the corresponding IPA characters, expressed in unicode (which should display directly if you have a unicode-capable browser with the right fonts), and also in the HTML escape codes for those unicode characters, so you can copy+paste into a web page or whatever. Have fun! Or not.
NB: this only supports plain SAMPA, not X-SAMPA, and hasn't been
tested very much. I spent about forty minutes on it or so.
Oh, a quick hint as I've noticed people get confused playing with this
without knowing what they're doing: None of the SAMPA characters are in
lower case, so anything you enter in lower case won't be translated
into anything, it'll just stay as it is. If you're still confused, check the
table linked. (ok I guess I should draw one up here, but eh...)
SAMPA specified:
IPA:
IPA as HTML codes: