AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I change the pitch of a song without changing its speed online?

Open AnyTool's Audio Pitch Changer, drop in your file, and drag the semitone slider (with cents fine-tune) or pick a target key while it plays — the pitch shifts but the speed and duration stay identical, and formant preservation keeps voices natural instead of "chipmunk". One-tap presets like Nightcore, Slowed and deeper/brighter voice snap the sliders instantly. Export WAV, MP3, M4A, OGG or FLAC. Everything runs in your browser — no upload, no watermark, no length cap, no CDN.

  • Shift pitch in semitones/cents or by musical key — speed stays unchanged
  • Formant preservation for natural voice shifts; Nightcore / Slowed presets
  • Real-time preview that updates while playing, plus WAV/MP3/M4A/OGG/FLAC export
  • 100% in your browser — no upload, no watermark, no length cap, no CDN

What is

Pitch shifting

Pitch shifting raises or lowers the perceived pitch of audio (in semitones or cents) while keeping the original tempo and duration — unlike simple resampling, which changes pitch and speed together. Formant preservation keeps the vocal timbre natural during large shifts. A client-side pitch changer does this in the browser with a WASM time-stretch engine, without uploading the file.

Audio Tools

Related terms

semitoneformanttransposetime stretchnightcore

How to Change Audio Pitch

Shift the pitch of audio without changing speed in your browser.

20 secWeb browser
  1. 1

    Add audio

    Drop in any audio file — it stays on your device.

  2. 2

    Set the shift

    Drag the semitone slider or pick a key/preset and hear the result live while it plays.

  3. 3

    Export

    Download as WAV, MP3, M4A, OGG or FLAC — nothing is uploaded.

Result: A pitch-shifted audio file

Frequently Asked Questions

No — the pitch shifts while speed and duration stay identical.

A true pitch-preserving WASM engine decouples pitch from tempo, so a +12 or -12 semitone shift does not speed up or slow the track, unlike basic resampling tools.

Yes — formant preservation keeps voices natural.

A formant control keeps the vocal character natural across large shifts and can be moved separately for creative gender/character voices — a feature no free web competitor exposes.

No — the shift runs entirely in your browser.

The file never leaves your device with no length or size cap, unlike vocalremover.org (10-minute cap), Moises (±2 semitones free) or server-side 123apps and AudioAlter.

Detailed Explanation

Methodology

How the Audio Pitch Changer Works

AnyTool shifts pitch entirely in the browser using a WASM time-stretch engine that decouples pitch from tempo, so changing the pitch leaves speed and duration unchanged. For preview, the decoded audio runs through the stretcher in an AudioWorklet; dragging the semitone/cents slider, picking a key, or moving the formant control updates the playing sound live. For export, the same engine renders the full buffer block-by-block on a worker to shifted PCM, which is written to WAV (Web Audio encodeWav) and, for MP3/M4A/OGG/FLAC, passed through a self-hosted single-threaded ffmpeg.wasm engine (bundled core, no CDN) with libmp3lame/aac/libvorbis/flac and a bitrate selector. Formant preservation keeps voices natural across large shifts.

  • Runs client-side — the audio is never uploaded
  • WASM time-stretch shifts pitch without changing speed
  • Formant preservation for natural voice shifts
  • Real-time AudioWorklet preview that updates while playing
  • Self-hosted ffmpeg core (bundled) — no CDN
  • Export WAV/MP3/M4A/OGG/FLAC
Privacy & Security

Privacy vs Cloud Pitch Changers

vocalremover.org caps input at 10 minutes, Moises limits free shifts to ±2 semitones behind an account, MyEdit gates downloads behind daily credits, and 123apps, AudioAlter, OpenMusic and CapCut all upload to a server. AnyTool shifts pitch on the device with no length or size cap, no sign-up and no watermark. It also exposes formant preservation — a quality feature no free web competitor offers — and a true pitch-preserving engine instead of the artifact-prone resampling some rivals use.

Pitch shifting: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Data handlingIn your browserOften uploaded
Speed unchangedYes (true stretch)Sometimes (resample)
Formant preserveYesRare
Live previewYes (while playing)Often re-render
Caps / signupNoneCommon

AnyTool is a privacy-first client-side pitch changer — shifting runs locally and nothing is uploaded.