Step 01 — source

Drop a file,
get two languages.

Drop audio or video, or browse

MP3 · M4A · WAV · MP4 · MOV · WEBM — 25 MB max

Over 25 MB? Compress it first:
ffmpeg -i in.mp4 -vn -ac 1 -ar 16000 -b:a 48k out.mp3