Music Transposer

A music transposer is a free online tool that transposes a song to a different musical key by shifting its pitch up or down in semitones — without changing the tempo or speed. Upload any track and move it higher or lower to match a singer's range, an instrument, or a new key.

Upload your MP3, WAV, M4A or MP4 file to KeyPitch, drag the Transpose (Semitones) slider up or down by the number of half-steps you want, preview the result, then click Download. Your transposed file opens directly in the KeyPitch Audio Studio where you can fine-tune and export.

Yes. KeyPitch is a full MP3 transposer — upload any MP3 and shift it up or down by semitones to change its key, then download the transposed MP3 (or export it as WAV). The tempo stays exactly the same; only the key changes.

Yes. KeyPitch doubles as a video transposer: upload an MP4 and transpose its audio by semitones while the picture stays in sync. It is perfect for transposing a music video, cover or tutorial before you preview, download or rehearse along.

Transposition is moving a piece of music from one key to another by raising or lowering every note by the same interval. A transposer does this digitally to a recording — shift it +2 semitones and a song in C major becomes D major.

A semitone (or half-step) is the smallest interval in Western music — the distance between two adjacent keys on a piano, such as C to C♯. Twelve semitones make up one full octave. KeyPitch lets you transpose by whole semitones from −12 to +12.

Count the half-steps between your current key and the target key. C to D is +2 semitones, C to G is +7 (or −5 going down), C to A is −3 (or +9 up). Each +1 transposes the song up one key and each −1 moves it down one.

Yes. KeyPitch uses time-stretching algorithms (SoundTouch) to transpose the key while keeping the original tempo and length. The song plays at exactly the same speed — only the key moves up or down.

Start at 0, then lower the song by 1–2 semitones if the chorus feels too high, or raise it if the verses feel too low. Preview after each step until the melody sits comfortably in your range. Most singers only need to transpose a few semitones to find their sweet spot.

C to D is two semitones up, so set the Transpose slider to +2. For D back to C, set it to −2. Because the interval is consistent, the same number of semitones transposes any starting key by the same musical distance.

Install the KeyPitch Chrome Extension. It adds a transpose and speed panel directly on YouTube so you can transpose any video by semitones in real time — no download needed. It is the easiest way to transpose backing tracks, karaoke songs and tutorials while you practise along.

They are closely related. Pitch shifting raises or lowers the pitch of the audio; when you shift every note by the same number of semitones, you transpose the song into a new key. KeyPitch transposes in whole semitones so the result always stays musical.

Yes. You can upload, transpose and preview any song for free. The full Audio Studio adds extra controls — fine semitone tuning, speed change, reverb, bass boost, 8D audio and more.

KeyPitch accepts MP3, WAV, M4A and MP4 files up to 50 MB and 10 minutes long. Once in the Audio Studio, you can export your transposed track as MP3 or WAV.

Small transpositions of 1–3 semitones are virtually transparent. Larger shifts can introduce mild artefacts. KeyPitch uses high-quality time-domain processing to keep the sound clean — for the best result, start from a WAV or high-bitrate source.

KeyPitch transposes from −12 to +12 semitones — a full octave down or up. Beyond roughly ±3–5 semitones, vocals and instruments can start to sound unnatural, so smaller moves usually sound best.