MacASCII Display will display the decimal ASCII code, hexadecimal code, and binary equivalent for any key you press. This can be especially useful for programmers. Plus, it can convert blocks of text to and from binary, hexadecimal, and decimal ASCII. You can optionally display the hexadecimal and decimal ASCII codes in HTML-style for use in Web pages.
What’s new in version 1.4.1
Updated on Oct 15 2013
Ready for OS X 10.9. Compatible with OS X 10.4 or later
Faster conversion of large blocks of text
Block convert size warning limit raised to 20,000 characters