♡2015 Dylan Holmes. My work here (including this HTML file, lookup.php, and phoneme.js) is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. (This means that you are free to use, modify, and re-distribute this work—even commercially—as long as you attribute the original to me and share your modified versions in the same way.)
The pronunciation data comes from the CMU Pronouncing dictionary for American English, which is available under a free license.