Audio Speed & Pitch Changer
New100% In-BrowserSpeed up or slow down any audio — 0.5× to 2× — with optional pitch preservation, plus semitone key changes. Export MP3 or WAV.
Select an audio file to speed up or slow down
MP3, WAV, M4A, FLAC, OGG · max 500MB · never uploaded
Change Audio Speed & Pitch — Free, Private, MP3/WAV Export
Speed up podcasts to get through them faster, slow down a fast guitar solo to learn it, transpose a song into your vocal range, or prep a funny deep-voice effect — without paying for a desktop editor or uploading your file to some converter site that keeps a copy.
How it works: 1) Drop in any audio file (MP3, WAV, M4A, FLAC — never uploaded). 2) Pick a tempo from 0.5× to 2×; with pitch preservation on, the voices and instruments stay at their natural pitch at any speed. 3) Optionally shift the key up or down by semitones (±12, duration unchanged), preview instantly, and export MP3 or lossless WAV.
Pitch-preserving tempo changes use granular overlap-add time-stretching computed in your browser's audio engine — the same fundamental technique (OLA with cross-faded grains) used by editors for decades. At extreme settings (below 0.6× or above 1.7×) transients soften slightly, which we state honestly rather than hide.
Frequently Asked Questions
Everything you need to know about using Audio Speed & Pitch Changer safely and efficiently.
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