Pitch & Speed Changer
Change the pitch and speed of any song independently — shift the pitch in Hz, slow it down or speed it up, free in your browser
Frequently Asked Questions
Everything you need to know about changing the pitch and speed of a song independently.
A pitch and speed changer is a tool that adjusts the pitch (how high or low a song sounds) and the speed (its tempo) of an audio file — together or completely independently. KeyPitch decouples the two: speed a song up without the vocals turning into chipmunks, slow it down without the pitch dropping, or shift the pitch while the tempo stays exactly the same.
Upload your MP3, WAV, M4A or MP4 file to KeyPitch, drag the Pitch (Hz) slider to raise or lower the pitch and the Speed slider to set the tempo anywhere from ×0.50 to ×2.00. Preview the result instantly, then click Download — your edited file opens in the KeyPitch Audio Studio where you can fine-tune further and export.
Yes — that is exactly what KeyPitch is built for. Traditional methods (tape, vinyl, simple resampling) tie pitch and speed together, so faster always means higher. KeyPitch uses time-stretching algorithms to change the tempo while the pitch stays untouched: slow a song down to learn a solo or speed it up for an edit, and the key never moves.
Yes. Move the Pitch (Hz) slider and the song shifts up or down while the tempo and duration stay exactly the same. For bigger jumps, the KeyPitch Audio Studio adds a Semitones slider (±12) so you can transpose a full octave in either direction — still without touching the speed.
Because of how analog playback and simple resampling work: play audio faster and every frequency in the waveform rises with it. That coupling is what creates the chipmunk effect when you speed up, and the deep, dragged-out sound when you slow down. Modern tools like KeyPitch process pitch and time separately, so you decide whether they move together or not.
Drop the Speed slider to around ×0.80 and lower the pitch slightly for that dreamy, underwater slowed + reverb sound. For the classic one-tap version — slowed speed, lowered key and rich reverb — use the KeyPitch Slowed + Reverb tool, which applies the full preset and lets you fine-tune every slider.
Push the Speed slider to ×1.20–×1.50 — around ×1.30 is the sweet spot for the viral sped up sound on TikTok and YouTube Shorts. Raise the pitch on top for brighter, chipmunk-style vocals, or keep it natural: since KeyPitch decouples pitch and speed, the choice is yours. The KeyPitch Speed Up tool applies the classic preset in one tap.
The chipmunk effect is the high, squeaky vocal sound you get when audio is sped up with pitch and speed coupled — like Alvin and the Chipmunks. With KeyPitch you control it: speed a song up while keeping the pitch natural to avoid it, or raise the pitch on top of the speed for the full chipmunk sound.
They are opposite remix styles. Slowed + reverb drops the speed (around ×0.80) and the pitch for a dreamy, moody feel; sped up raises the speed (around ×1.30) and the pitch for a bright, energetic sound. Both took off on TikTok. With this pitch & speed changer you can make either one — or experiment anywhere in between.
Yes — install the KeyPitch Chrome Extension. It adds a pitch and speed control panel directly on YouTube, so you can shift the key by semitones and change the playback speed live while the video plays — no download needed. Perfect for practising instruments, transposing backing tracks or testing slowed and sped up feels instantly.
Yes. The KeyPitch Chrome Extension works on both YouTube and YouTube Music. Open any song or video, set the pitch in semitones and the speed multiplier, and hear the change in real time as it plays — ideal for singing along in your key, slowing down practice tracks or trying a sped up feel before making an edit.
The Hz slider sets the reference tuning of the track. 440 Hz is the international standard for the note A4; the slider covers 415.3 Hz to 466.2 Hz — one full semitone down to one semitone up. Use it to retune a song to 432 Hz, match baroque pitch (~415 Hz) or align a recording with your instrument's tuning, all without changing the speed.
Yes — this is one of the most popular uses. Set the Speed slider to ×0.50–×0.75 and the song plays at half to three-quarter speed in the original key, so every note of a fast solo or riff is easy to hear and play along with. Speed it back up gradually as you improve.
Small changes are virtually transparent. KeyPitch uses high-quality time-stretching (SoundTouch) to keep the audio clean even at stronger settings. Extreme combinations — very slow speeds with large pitch shifts — can introduce subtle artifacts, so preview the result and start from a WAV or high-bitrate MP3 for the best quality.
KeyPitch accepts MP3, WAV, M4A and MP4 files up to 50 MB and 10 minutes long. Upload a video and the pitch and speed changes are applied to its audio while the picture stays in sync. In the Audio Studio you can export as MP3 or WAV — or as MP4 if you uploaded a video.
Yes. You can upload a song, change its pitch and speed and preview the result for free, with no signup. The full Audio Studio adds extra controls — semitone key shifting, reverb, bass boost, 8D audio and more — for the perfect export.