DollarWise

Pitch Changer — Change Audio Pitch Online Free (Semitones)

October 12, 2026 · 2 min read · By the DollarWise team

Raise or lower the pitch of any audio by up to a full octave (±12 semitones). Make chipmunk voices, deep movie-trailer tones, or shift a backing track into your singing key.

Pitch Changer

Shift pitch up or down by semitones — chipmunk, deep voice, or a key change.

100% Free Forever No Sign-up No Credit Card Private — files never leave your browser Unlimited Use

1 Add your audio file

Drag & drop your file here or click to browse

    2 Settings

    4
    +4 is a fun lift, +12 an octave up, −12 an octave down.

    3 Process & download

    Working…

    ✅ Done — your audio is ready

    🎉 Free forever. No sign-up. No credit card. No limits.

    This tool runs entirely in your browser — your files are never uploaded anywhere.

    How to use it

    1. Add your audio — voice, song or instrument track.
    2. Slide the semitones — try +5 for a chipmunk voice or −6 for a deep one.
    3. Process & download. Keep-tempo on = same length; off = classic speed-up/slow-down feel.

    About this tool

    Pitch is measured in semitones — 12 semitones make an octave. This tool resamples the audio at a shifted rate, which moves every note up or down together. With ‘keep tempo’ on, a time-stretch then restores the original length, so you get a pure key change; with it off you get the classic chipmunk (faster + higher) or slow-motion (slower + deeper) effect.

    Singers use small shifts (±1–3 semitones) to fit a backing track to their vocal range.

    Frequently asked questions

    What is a semitone? The smallest step in Western music — one piano key. Twelve semitones double (or halve) the frequency, which is an octave.

    Why does keep-tempo sound slightly different? Time-stretching is a digital trick; extreme shifts can add a warbly texture. Small shifts sound clean.

    Are my files uploaded? No — 100% in your browser.

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