Pitch Tempo

Pitch Tempo is a free browser tool for musicians who want to practise with a recording at a different speed or key. Upload a supported audio file, find its estimated key or BPM, adjust pitch and tempo independently, preview a short section and export the result. Tempo ranges from 50% to 150%; pitch spans -12 to +12 semitones. Supports nine common audio formats, with a five-minute and 100 MB file limit. Guests receive three uploads per 24 hours; accounts receive five per hour. Audio expires after 24 hours for guests or seven days for accounts.