MP3 Pitch Changer

Change the pitch of MP3 files online: add one MP3 or a whole list, shift every file up or down by up to 12 semitones, and download new MP3 files at the source bitrate or 128 to 320 kbps. The tempo and length stay the same, each file shows its key, and nothing is uploaded.

Transpose MP3 Files

MP3 in, MP3 out: add your files, choose the shift, convert, download. The tempo stays the same.

Step 1Choose MP3 filesor drop them here: one file or up to 20 at once, each up to 10 minutes. WAV, M4A, OGG and FLAC work too; you always get MP3.

Your files are processed in your browser. Nothing is uploaded.

Step 2 Pitch change

No change yet: 0 semitones −1 is one half step lower, +2 one whole step higher.

Semitones (−12 to +12)

−1 +1 Reset

Applies to every file in the list. Tempo and length stay the same.

More options (fine tune in cents, MP3 bitrate)

Fine tune:

0 cents

100 cents = 1 semitone. Leave it at 0 unless a track is slightly out of tune. MP3 bitrate (kbps)

Match source 128 192 256 320

Match source keeps each file's bitrate (rounded up to the next choice; 192 if unknown). A higher bitrate than the source makes a bigger file, not a better one.

Step 3 Your files

No files yet. Each MP3 you add appears here with its length, bitrate and key.

Convert to MP3 Download all (ZIP)

Start with Step 1: choose one or more MP3 files.

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Related tools

How to change the pitch of an MP3

1. Add your MP3 files. Tap Choose MP3 files or drop them on the tool: one file or up to 20, each up to 10 minutes. WAV, M4A, OGG and FLAC also work; the result is always MP3.
2. Check the list. Each file shows its length, bitrate, sample rate and key, for example Key: G major.
3. Set the shift. Press −1 or +1 once per semitone (−12 to +12). It applies to every file, and each row shows the new key: Key: G major → F major. Cents and bitrate sit under More options.
4. Convert and listen. Press Convert to MP3, then ▶ Result to hear the finished file and ▶ Original to compare.
5. Download. Save each MP3, or press Download all (ZIP). File names carry the change: song_-2st.mp3.

How MP3 pitch changing works

Transposing an MP3 moves every note by the same number of semitones. One semitone multiplies each frequency by 2^1/12 ≈ 1.0595, so +1 is about 5.95 % higher; 12 semitones make one octave, and 100 cents make one semitone (more in what semitones are). Example: A4 at 440 Hz becomes 523.25 Hz after +3 and 329.63 Hz after −5.

Why the tempo stays the same: playing an MP3 faster raises pitch and tempo together. This tool separates them: a phase vocoder stretches the audio in time, then resamples it, so only the pitch moves (see pitch vs tempo).

What happens to the MP3 itself: MP3 is a lossy format, so a changed file has to be encoded again. The tool keeps that loss small in four ways:

• One encode only: decoded once, shifted in 32-bit floating point, encoded once. Always start from the original: every extra round adds loss.
• Matched bitrate: Match source reads the bitrate from the MP3 header (the Xing header for variable bitrate) and uses the next setting up: a 160 kbps file becomes 192 kbps.
• Same sample rate and channels: 44.1 kHz stays 44.1 kHz, 48 kHz stays 48 kHz, and mono stays mono.
• No clipping: peaks stay below −1 dBFS, because MP3 decoding can overshoot.

Every MP3 encoder adds 25–60 ms of silence (encoder delay and padding); the music keeps its exact tempo.

MP3 bitrate and file size

The bitrate decides the file size: size = bitrate × length ÷ 8. Choosing a higher bitrate than the source makes a bigger file, not a better one, because the detail removed by the first encode does not come back.

MP3 file size by bitrate and length (1 MB = 1,048,576 bytes)

Bitrate	3-minute song	4-minute song	5-minute song	Use it for
128 kbps	2.7 MB	3.7 MB	4.6 MB	Speech, practice tracks
192 kbps	4.1 MB	5.5 MB	6.9 MB	Most music; default if unknown
256 kbps	5.5 MB	7.3 MB	9.2 MB	High-quality sources
320 kbps	6.9 MB	9.2 MB	11.4 MB	320 kbps sources (MP3 maximum)

Transpose MP3: which shift for which task?

Common reasons to transpose an MP3 and the shift to use. For other keys, see the music key chart.

Common MP3 transpositions

Task	Semitones	Example key	Interval	Frequency
Song a little too high	−2	G major → F major	down a whole step	−10.9 %
Song too low	+3	D major → F major	up a minor third	+18.9 %
Track tuned to E♭, you play in E	+1	E♭ major → E major	up a half step	+5.9 %
Same key as capo 2	+2	E major → F♯ major	up a whole step	+12.2 %
Male to female key	+5	G major → C major	perfect fourth (±5 to ±7 typical)	+33.5 %
One octave	+12	A major → A major	same key, octave higher	+100.0 %

Who transposes MP3 files?

Singers move a song into their range: when the top notes strain, −1 to −3 semitones is usually enough (see song too high for your voice). Measure your range first with the vocal range test.

Bands and instrumentalists convert a whole set list of practice tracks at once and download the ZIP. Choirs and teachers share rehearsal MP3s in their performing key, and podcasters retune slightly flat recordings with cents.

On a phone the tool works in the browser; for apps and editors, see changing pitch on iPhone and Android or changing pitch in Audacity.

Sound quality and limits

• Pitch accuracy: every converted MP3 we re-measured landed within 0.1 cents of the exact target (1 cent = 1/100 semitone).
• Key: a song in G major shifted +3 was detected afterwards as B♭ major, and its length changed by 0.1 %.
• Speed: about 15 seconds of audio per second on a desktop computer: three files (64 seconds of audio) were converted in 4.4 seconds. Phones take longer.
• Artefacts: up to ±3 semitones sounds natural; beyond ±5, voices sound thin (up) or dark (down).
• Limits: up to 20 files per list, 10 minutes and 200 MB per file.

MP3 pitch changer or another tool?

Which tool fits your task

Tool	Use it when	Output
MP3 pitch changer (this page)	You have one or many MP3s and want MP3s back, fast	MP3, one shift for the whole list
Online key changer	You pick a target key by ear, with a loop	MP3 or WAV, one song
Audio pitch changer	You want WAV back or edit on a waveform	WAV or MP3
Pitch shifter	You shape a sound: voices, effects, samples	Free shifts
Online pitch changer	You want a quick pitch change of any audio	Home tool

Questions about changing the pitch of an MP3

How do I change the pitch of an MP3 without changing the speed?

Add the MP3 to the tool above, set the semitones and press Convert. The pitch moves with a phase vocoder while the length and tempo stay the same: a 3:20 song still lasts 3:20. Then download the new MP3.

Does changing the pitch lower the MP3 quality?

A little, because the MP3 is encoded once more. Keep the loss small by starting from the original file, keeping Match source as the bitrate and changing the pitch in one step rather than in several rounds.

Which MP3 bitrate should I choose?

Keep Match source: it uses the bitrate of your file, rounded up to 128, 192, 256 or 320 kbps. Pick 128 kbps for small practice files and 320 kbps only when the source is 320 kbps.

Can I transpose several MP3 files at once?

Yes: add up to 20 MP3 files, set one shift and convert them in one go. Download each file, or all of them as one ZIP. Every file name carries the change, for example song_+2st.mp3.

How many semitones do I need to change the key of an MP3?

Count the half steps from the old key to the new one: G to F is −2, C to E♭ is +3. Each row shows the new key as you change the shift, and the key-change chart under Related tools lists every pair.

Is the MP3 pitch changer free, and are my files uploaded?

It is free, with no sign-up, and your files are never uploaded. Your browser decodes, shifts and encodes the MP3 on your own device, so it also works with private recordings.

Can I change the pitch of a YouTube song or a video?

This page works with audio files. For a video file, use the video pitch changer under Related tools; for songs you play on YouTube, the YouTube pitch changer shifts them while they play.