Free Pitch Changer Online
Change song key online by up to ±12 semitones without changing speed. This free music pitch changer, song key changer, and pitch shifter runs entirely in your browser — no signup, no upload.
Online pitch changer and song key changer
Use this online pitch changer, key changer, and audio pitch shifter to raise or lower a song in semitones while keeping the original duration intact. It is built for transposing backing tracks, practicing covers in your key, matching a song to a singer's vocal range, and preparing karaoke tracks without changing tempo.
Change pitch without changing tempo
Unlike speed-up tricks (cassette / vinyl style), this preserves duration. A 3-minute song stays 3 minutes after shifting — change pitch without changing speed, or change speed without changing pitch.
Song key changer for karaoke, covers, and practice
Transpose an entire song up or down. ±5 to ±7 semitones is the typical range for karaoke key changes; ±12 is a full octave for extreme transposition.
Browser pitch shifter for MP3, WAV, M4A, and video
Vocal-only, instrumental, full mix, or video audio — the algorithm handles all. Processing happens locally using soundtouchjs and Web Audio; your file never leaves your device.
Online pitch changer FAQ
What is a semitone?
A semitone is the smallest standard pitch interval in Western music — one piano key (white or black) to the next. 12 semitones = 1 octave.
Can I use this song key changer for my vocal range?
Yes. If the song is in C and you sing better in G, shift down by 5 semitones. Use BPM & Key Finder first to detect the original key, then transpose accordingly.
Why does a big pitch shift sound weird?
Shifting ±7 semitones or more starts to sound artificial. Best results are within ±3 to ±5 — most karaoke transpositions sit comfortably in this range.
Does this work as an online pitch shifter for video audio?
Yes — drop a video file (MP4 / MOV), we extract the audio track and shift its pitch, then export as MP3, WAV, or M4A. Re-mux into the video using any standard editor.
Is this pitch changer really free?
Yes — fully free, no signup, no upload, no credit cost. All processing runs locally in your browser, so it costs us nothing to serve.