This app was removed from the App Store.
Any Base Converter
Mac OS Developer Tools
Simple and capable, Any Base Converter is an unobtrusive base converter that gets out of the way. Simply start typing in one of the predefined base fields and, as you type, the other base fields show the result. Conveniently placed separators and a mono spaced display font minimize errors. Double clicking any of the base fields will select a result section and triple clicking selects the entire result for a quick copy and paste into your applications.
Need to convert to an arbitrary base or convert a negative value? Any Base Converter will handle this. For Arbitrary bases from 2 to 36, enter a base value and then enter another base value to convert to it. Entering a negative base 10 value will display a two's compliment result in the other bases. Other base values display as both signed and unsigned base 10 values.
Need to do a quick ASCII lookup? Type the character in and the other base fields will show the ASCII value.