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Speed up or slow down audio without changing the pitch — or tape-style, where pitch follows speed — from 0.25× to 4×.
Also covers: Change audio speed · Slow down audio · Speed up MP3 · Tempo changer
Drop an audio file here
MP3, WAV, M4A/AAC, FLAC, Ogg, Opus and WebM — whatever your browser can play. Audio is processed on your device and never uploaded.
Songs, lectures, podcasts or voice notes.
From 0.25× to 4×, keeping the original pitch or letting it change like a tape.
Listen to the result, then save it as MP3 or WAV.
With WSOLA time-stretching: the audio is cut into short overlapping pieces that are re-spaced and lined up by similarity, so the tempo changes but the pitch doesn't. It runs in a background worker so the page stays responsive.
Speech and most music stretch cleanly between about 0.5× and 2×. Extreme settings can sound phasey or echoey — that's inherent to time-stretching.
Like playing a record at the wrong speed: faster is higher-pitched, slower is lower. It sounds perfectly clean but changes the pitch.
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Cut an MP3, WAV or other audio file to the part you want: drag across the waveform, fine-tune the times, and save as MP3 or WAV — in your browser.
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Join several audio files into one, in the order you choose, with optional gaps or crossfades — mixed formats and sample rates are handled for you.
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Split an audio file into parts at points you click, into equal parts, every N seconds or at silences, and download each part or all of them as a ZIP.
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Make audio louder or quieter by decibels, normalise to a peak level, or to a loudness target (LUFS) for Spotify, YouTube, Apple Music or podcasts.
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Add a fade-in and fade-out to audio with linear, exponential, logarithmic, equal-power or S-curve shapes, and hear the result before saving.
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Shift the pitch of a song or recording up or down by semitones and cents while keeping its length — to change key or practise along.