Free online auto-tune — vocal pitch correction in your browser, no upload. Correct your voice to any key and scale, then compare the original and corrected versions side by side. No account, no install, no server.

Your voice never leaves your device

Everything runs locally using WebAssembly. The audio file stays in your browser tab and is never sent anywhere. That also means processing is fast — there's no waiting on a server, and no file size limit tied to an upload quota.

Hear what your take sounds like in tune — without a DAW

This won't replace a professional studio plugin like Auto-Tune Pro or Melodyne. The audio quality isn't the same, and that's honest. But if you just want to hear a rough take corrected to a key, check whether a phrase is flat, or explore what pitch correction even sounds like on your voice — it does the job. No subscription, no learning curve.

Play the original and the corrected version back to back

After processing, you can load the original or the tuned take into the player and switch between them. The pitch roadmap graph below the controls shows the original line in gray and the corrected line in pink — so you can see exactly which parts moved and by how much.

KeyScale

Strength 80%Retune Speed 55%Tolerance 50¢

Record or upload an audio file first. Auto-Tune will then correct your pitch while preserving your vocal timbre.

How to use it

Record a take using the Controller strip in the header, or upload an existing audio file. Once a recording is loaded, the controls below become active. Set your key and scale, adjust the three sliders to taste, and press Apply Auto-Tune. The corrected file is generated in your browser — no upload, no wait.

What each control actually does to your voice

Key — Tell the tool what key the song is in. If you're singing a C major melody, pick C. Getting this wrong means your notes will be pulled toward the wrong pitches — you'll hear it immediately. If you're not sure of the key, set Scale to Chromatic: it snaps each note to the nearest semitone without forcing it into a specific key.
Scale — Defines which notes are allowed after correction. Major is the bright, "happy" sound most Western pop uses. Minor (natural or harmonic) is darker and more dramatic. Pentatonic is the five-note scale behind most rock, R&B, and soul leads — it's hard to go wrong with it. Blues adds the blue note for that characteristic bent feeling. Chromatic doesn't restrict anything, just moves each pitch to the closest half step.
Strength (0–100%) — How hard the correction pulls your pitch toward the target note. At 100% it snaps completely — every note locks to the scale with no wiggle room. Around 60–75% the correction is audible but your voice still has some natural movement. Below 40% it's subtle enough that most listeners won't notice anything except that you sound a bit more in tune. Start around 75% and go from there.
Retune Speed (0–100%) — How quickly your pitch moves to the corrected note. Lower values (closer to 0%) mean the correction kicks in almost instantly — this is the hard, robotic T-Pain sound. Higher values (closer to 100%) mean the pitch glides slowly toward the target, which lets vibrato and natural pitch bends survive. For natural-sounding correction, somewhere around 50–70% usually works well. For the obvious effect, go lower.
Tolerance (0–100¢) — A dead zone around each target note. Notes that land within this distance (in cents — hundredths of a semitone) are left completely alone. Only pitches further away get corrected. This is useful for blues and jazz where slight pitch bends are intentional: raise Tolerance to 30–50¢ and those deliberate inflections won't get snapped flat.

Before you hit Apply

You need an active recording or upload — the Apply button stays grayed out until a take is loaded via the Controller strip in the header.
If you don't know the key, Chromatic is a safe default. It corrects pitch without forcing a specific tonal center.
A good starting point: Strength 75%, Retune Speed 55%, Tolerance 25%. Listen, then adjust from there.

After processing

Pitch roadmap — the gray line is your original pitch, the pink line is the corrected version. Gaps mean unvoiced sections (consonants, breath). Zoom in on the Y-axis range if your voice sits in a narrow register.
Load Original / Load Auto-Tuned — pushes either version into the Controller player so you can compare them at the same timestamp.
Re-apply — change your settings and run again. It always reprocesses from the original, so corrections don't stack.
Download — use the download button in the Controller strip to save as WAV, MP3, or other formats.

Who this is actually for

Singers who want to hear a practice take corrected and see which notes keep landing flat or sharp.
Songwriters who record rough demos and want a quick pitch cleanup before sharing.
Anyone curious what their voice sounds like with pitch correction, without buying a plugin.
Voice teachers who want to demonstrate the before/after of intonation work in a lesson.

Auto-Tune — Browser Pitch Correction for Vocals | MusicalBoard