Audio Speed & Pitch Changer

Speed up, slow down, and adjust audio pitch directly in your browser using WebAssembly. Precise tempo scaling with zero server uploads.

Live

MP3
WAV
AAC
OGG
FLAC
M4A

100% Local Processing — Audio tempo/pitch adjustment executed entirely in your browser WebAssembly sandbox. Nothing is ever uploaded.

Speed up or slow down audio tracks from 0.5x to 2.0x and shift pitch in semitones directly in your browser using WebAssembly. 100% private with zero server uploads.

Drag and drop your mp3, wav, m4a, ogg, flac, or aac audio files here

One file to begin. It is handled for this request and not retained.

How to use this tool

Drop or select an audio file (MP3, WAV, AAC, OGG, FLAC, or M4A).
Use the Playback Speed (Tempo) slider to speed up (up to 2.0x) or slow down (down to 0.5x) the track.
Optionally adjust the Pitch Shift slider in semitones to make sound higher or lower in key.
Listen to live preview playback to audition your tempo changes in real time.
Select your target export format (MP3, WAV, FLAC, M4A, or OGG) and bitrate.
Click Apply Speed & Pitch to render your modified track with in-browser WebAssembly.
Preview the finished track and download your modified audio clip.

Frequently asked questions

Quick answers about file privacy, processing modes, formats, and device support.

By default, Elixuvo uses FFmpeg's advanced atempo filter to change playback speed without altering the musical pitch or causing 'chipmunk' effects. If you do wish to change pitch, you can independently adjust the Pitch Shift slider.

Yes! For a classic Nightcore sound, increase speed to around 1.25x–1.3x and raise pitch by +2 to +4 semitones. For a chopped or slowed sound, decrease speed to 0.8x–0.85x and lower pitch.

You can import and export MP3, WAV, AAC, M4A, OGG, and FLAC audio files directly in your web browser.

FFmpeg uses phase vocoder algorithms to preserve acoustic transients. Exporting to lossless formats like WAV or FLAC maintains 100% audio fidelity.

Zero. Everything executes 100% locally on your computer inside your browser's WebAssembly sandbox. Your audio files are never transmitted to external servers.

audio

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