Kostenlos Audio Speed Changer
Speed up or slow down audio with the pitch preserved (great for podcasts) or shifted. Export as MP3. Runs entirely in your browser, no upload.
Dateien hier ablegen oder klicken zum Durchsuchen
MP3, WAV, FLAC, OGG, AAC, M4A, Audio keine dateigrößenbeschränkung
Deine Dateien verlassen nie dein Gerät. Die Verarbeitung findet lokal in deinem Browser statt.
Speed up or slow down audio — keep the natural pitch (great for podcasts and audiobooks) or shift the pitch. Runs entirely in your browser.
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So funktioniert es
Changing audio speed can either keep the pitch natural (so a sped-up voice doesn't sound like a chipmunk) or shift it (the classic record speed-up). This does both with FFmpeg in your browser.
- 1FFmpeg.wasm loads onceThe WebAssembly build downloads on first use and is cached afterwards.
- 2You pick a speed and pitch modeFrom 0.5× to 3×, with "keep natural pitch" on or off. The file stays in your browser.
- 3FFmpeg re-times the audioNatural-pitch mode uses chained atempo filters (time-stretch); pitch-shift mode uses asetrate (speeds and pitches together).
- 4Download the MP3The result is encoded to MP3 and previewed with the built-in player.
Speed up a podcast or audiobook, or make a "slowed + reverb"/"nightcore" edit, entirely on your device — nothing is uploaded.
Warum unseres?
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