Can I change BPM without changing the key?

Yes. Set a new target BPM and leave the pitch control at zero. The song speeds up or slows down while keeping its original musical key.

Can I change pitch or key without changing the speed?

Yes. Leave the BPM at its detected value and move the pitch control by semitones. The tool shows the resulting target key while tempo stays unchanged.

What does formant compensation do?

Formants shape the recognizable character of a voice. Compensation adjusts them while pitch shifts, helping vocals retain a more natural tone.

Will large changes affect audio quality?

Every time-stretching algorithm has limits. Small and moderate changes usually sound cleaner; extreme tempo or pitch changes can introduce smearing, phasing or transient artifacts.

Does the changer upload my song?

No. Decoding, key and tempo analysis, audio transformation and WAV encoding happen locally in the browser.

Why does the tool export WAV instead of MP3?

WAV encoding is deterministic and runs locally without a proprietary MP3 encoder. It also avoids adding another lossy compression pass to your edited audio.

Free audio pitch and speed changer

Key and BPM Changer Online

Set a new song key or target BPM with independent pitch and tempo controls. Change tempo without changing pitch, or transpose audio without changing speed—all in your browser.

No audio uploadsIndependent pitch and tempoLocal WAV export

Drop an audio file here

MP3, WAV, M4A, FLAC or OGG

Audio stays in memory on this device and is never uploaded.

How to change song key and BPM

Create a karaoke version in your range, slow down a practice track or match a song to a target tempo without installing audio software.

Add your song

Choose an audio file. The browser decodes it locally and analyzes its starting key and BPM.

Set pitch and tempo

Set a target BPM to change speed without changing pitch, or transpose by semitones to change key without changing tempo.

Preview and export

Listen to the changed track, refine the controls and render a WAV file directly on your device.

Audio pitch changer and speed changer in one

Choose the exact job you need: change BPM while preserving key, transpose pitch while preserving tempo, or adjust both with independent controls.

Audio speed and BPM changer

Speed up or slow down a song and choose a target BPM while keeping its musical key and pitch unchanged.

Audio pitch and key changer

Transpose the entire track up or down in semitone steps for a new musical key or a more comfortable vocal range without changing speed.

Formant compensation

Reduce chipmunk-like or unnaturally deep vocal character when shifting pitch.

Real-time preview

Hear tempo and pitch changes before committing to a full offline render.

WAV export

Render the transformed audio in the browser and download an uncompressed WAV file.

Private processing

The source audio and transformed samples stay in memory on your device throughout the workflow.

Music and audio workflows

Free workflows for everyday music tasks

Analyze key and tempo, transpose songs and slow down practice tracks with tools that run locally on supported browsers.

Move a song into a key that fits your voice

Transpose a backing track by semitones without changing its tempo, preview the result and compare versions before you export.

View workflow

Slow down difficult music without changing its pitch

Practice a passage below performance tempo, keep every note in the original key and increase BPM in controlled steps.

View workflow

Plan harmonic DJ mixes with key, BPM and Camelot code

Analyze your tracks, identify harmonically compatible neighbors and decide where tempo or key adjustment can support a cleaner transition.

View workflow

Key and BPM changer FAQ

Answers about changing audio pitch, key, speed and BPM independently, plus local browser-based export.

Related tools

Continue working with your audio

Choose another focused browser tool for the next step in your workflow.

Free Online Metronome

Open tool

Key and BPM Changer Online

Set a new song key or target BPM with independent pitch and tempo controls. Change tempo without changing pitch, or transpose audio without changing speed—all in your browser.

Open Key and BPM Changer Online Find Key & BPM

Processing and export stay on your device.