Change the key of
supported audio.
Pitch-shift a supported file you have rights to use, up or down by semitones — without changing the tempo. Perfect for matching your tuning, your singer's range, or just moving a song to a more comfortable key.
Drop a song, or click to choose
Files stay private · Deleted after 1 hour
MP3 · WAV · M4A · FLAC · OGG — up to 20 MB · 5 minutes
Pick the new key
±0 semitonesShifting pitch… 0%
Your transposed track is ready
✓ DoneDownload this result, then upload it yourself to your account. Nothing is transferred automatically. Free tool limits apply. Want a whole library of shifted tracks? Try the full app →
01 / Upload
Drop your song
Any MP3, WAV, M4A, FLAC, or OGG file you own, up to 20 MB and 5 minutes long.
02 / Shift
Choose semitones
Up to ±12 semitones. The tempo stays the same — only the pitch changes.
03 / Download
Take it with you
Get your transposed track as an MP3, ready for practice or performance.
For working musicians
Tune the song,
not your guitar.
Download your transposed result and upload it to the full stempo app when you want to keep practicing. Organize tracks into playlists, remove the guitar, loop tricky sections and add markers. Your free-tool upload is never added to an account automatically.
Try stempo free →Common questions
Will changing the key change the tempo?
No. We use modern pitch-shifting that preserves the original tempo while changing only the pitch. The song plays at the same speed, just in a different key.
How far can I shift?
Up to one octave in either direction (±12 semitones). Smaller shifts (±1–4 semitones) produce the cleanest results. Extreme shifts can introduce audible artifacts.
What's a "semitone"?
A semitone is the smallest musical interval in Western music — one fret on a guitar, or one key on a piano. Twelve semitones equal a full octave.
Why would I want to change the key of a song?
Common reasons: matching your guitar's tuning (e.g., you tune half-step down so you shift the track up a half-step), making a song singable for a different vocal range, or simply finding a more playable key.
Is the audio quality preserved?
Mostly. Pitch shifting is a destructive process — the further you shift, the more artifacts can appear. Small shifts sound nearly identical to the original.
Can I do this for a whole library of songs?
Yes — that's what the full stempo app is for. Download the transposed file and upload it to your library, then organize it into playlists and practice with tempo control and looping.