The official ICAO spellings are Alfa and Juliett. Alfa is written with an f because speakers of some languages would not read the ph in Alpha as an f sound, and Juliett has a double t so French speakers do not drop the final t. AnyTool outputs the official spellings but still accepts Alpha, Juliet and X-ray when you decode.

By default digits are spoken as plain words — Zero, One, Two, up to Nine. Switch on ICAO digits and the tool uses the aviation radiotelephony forms: Tree for three, Fower for four, Fife for five and Niner for nine, which are designed to be clear over a noisy radio link. The ITU maritime set uses its own figure words such as Nadazero and Unaone.

The read-aloud feature uses your browser built-in speech synthesis to speak the code words, so you can learn the pronunciation or check a spelling by ear. You can pick any voice installed on your device and set the speaking rate. It is feature-detected, so if a browser has no speech support the rest of the tool still works, and speech stops the moment you press Stop or leave the page.

Encoding, decoding and speech all run locally in your browser. Nothing is sent to a server, there is no account or tracking, and the page keeps working offline after the first load — so you can spell out names, codes or confidential strings safely.