100% client-side • Nothing uploaded
Inspect audio metadata, compare output formats, and re-encode using browser APIs where possible (WAV always supported). Educational & private.
True cross-format conversion (especially MP3) needs a backend. This tool shows accurate metadata, size estimates, and performs real client-side re-encoding where the Web Audio & MediaRecorder APIs allow.
MP3, WAV, OGG, M4A • up to 30 MB