Just remember, on this one from Sinbad: http://valuesearch.info/chordfind/Default.aspx

it doesn't know 11th or 13th chords or their variants like 7#11. It will tell you whether a 4th (same note as 11th) or 6th (same note as 13th) is in the lower octave or upper by the order, but it doesn't have the intelligence to spell the chord correctly with an 11th or 13th. It's only mostly acceptable up to a 9th. And if you have a m7 and add a 9th, for example, it should know to drop the 7. Too bad they couldn't finish it correctly, because this utility has a lot of promise. BIAB has the MIDI chord recognition feature that does not make these mistakes.

The chordfind utility link also has no protection about too many notes to make a 'useable' chord, since if you 'drop a book on the keyboard' it tells you every note.

BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors