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무료 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.
파일 크기 제한 없음파일이 비공개로 유지됨로그인 불필요영원히 무료
파일을 여기에 끌어다 놓거나 클릭하여 찾기
MP3, WAV, FLAC, OGG, AAC, M4A, Audio 파일 크기 제한 없음
파일이 기기를 떠나지 않습니다. 모든 처리는 브라우저에서 로컬로 이루어집니다.
Speed up or slow down audio — keep the natural pitch (great for podcasts and audiobooks) or shift the pitch. Runs entirely in your browser.
Optimize for your platform
사용 방법
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.
왜 저희 도구인가요?
✓Completely free — no hidden costs, ever
✓No account, email, or login required
✓Files stay on your device — processing happens in your browser
✓Works on any device — phone, tablet, desktop
✓No watermarks on any output
✓Browser memory limits may apply for very large files
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