Turn a file or some text into a WAV file. Everything happens on this device. Nothing is uploaded.
At least 12 characters. A few random words work well.
There is no way to recover a forgotten password.
Without encryption, anyone with the WAV and this site (or the format description) can read your data, and changes to the file can’t be detected.
Saved in the WAV so decoding can restore the file name’s extension. Others can see it even when the file is encrypted.