Audio Pitch Changer — Free Online

Pitch shifting is fundamental to music production and audio editing: transpose a vocal recording to fit a different key, raise a voice sample by a semitone to match an instrument, or create special effects by shifting pitch dramatically. In a DAW this is a routine operation, but accessing that capability without a full production environment usually means installing bulky software.

This pitch changer shifts the pitch of any audio file up or down by a precise number of semitones, with the option to preserve the original tempo. Upload your file, enter the desired shift, and download the result. It works on speech, music, and any other audio content.

How to Change Audio Pitch Online

1. 1

   Upload your audio file

   Drop any MP3, WAV, FLAC, OGG, or AAC file. Files up to 100 MB are supported.

2. 2

   Set the pitch shift amount

   Enter a pitch shift in semitones (e.g. +2 semitones raises pitch, -3 semitones lowers it). Speed is preserved.

3. 3

   Download your pitch-shifted audio

   Click Apply. FileCrank shifts the pitch and exports your audio. Files are deleted within 1 hour.

How Pitch Shifting Works

Pitch shifting without altering tempo — known as pitch-only transposition — uses the same phase vocoder framework as time-stretching, but with an additional resampling step. The audio is first time-stretched to compensate for the pitch-induced duration change, then resampled at a rate corresponding to the desired pitch interval. The combination of these two operations changes pitch while leaving duration intact.

One semitone corresponds to a frequency ratio of 2^(1/12), approximately 1.0595. The tool uses SoundTouch's pitch-shifting pipeline compiled to WebAssembly, which handles the phase vocoder reconstruction with care for transient sharpness, important for preserving the clarity of attack transients in percussive and vocal material.

Why Use FileCrank to Change Pitch?

• ✓ Shift pitch by any number of semitones without changing speed.
• ✓ Supports MP3, WAV, FLAC, OGG, and AAC input.
• ✓ Useful for music key changes and voice adjustments.
• ✓ No watermarks, no signup, completely free.
• ✓ Files are processed securely and deleted within 1 hour.

Características y Especificaciones

Tamaño máx. de archivo

Hasta 100 MB

Privacidad

Archivos eliminados tras aproximadamente una hora

Precio

Gratis, sin registro

Procesamiento

En el servidor

Frequently Asked Questions

Online Pitch Shifter vs DAW Plugin

DAW pitch-shift plugins (Auto-Tune, Melodyne, Waves Pitch) offer granular control and real-time preview, but require a full DAW environment and often a paid licence. For a simple semitone shift on a standalone file, this browser tool delivers equivalent algorithmic quality — using the same class of phase vocoder — without any installation or cost.

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