Pitch Tempo

Pitch Tempo is a free web tool for preparing practice audio. You upload a track of up to 5 minutes and 100 MB in MP3, WAV, AAC or similar formats, and it estimates the musical key and BPM. From there you can change pitch by up to 12 semitones either way and tempo between 50% and 150%, each independently, preview the first 20 seconds and download the result. The workflow runs as a short chat, so you can ask for changes in plain language. Guests can start three new sessions every 24 hours without an account, and signing in raises that to five an hour. Processing happens on the site's own server. Guest audio is deleted after 24 hours and account audio after 7 days, and the privacy policy says uploads are never published or used to train AI models. Separate BPM and key calculators work without uploading anything.