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Free online audio tool
Change Audio Speed
Speed up or slow down speech while keeping voices at a natural pitch.
1 Choose a file
2 Settings
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3 Preview
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준비 중...0%
4 Process and download
Your audio is processed locally and never uploaded to a server.
Change timing while preserving voice pitch
Choose any speed from 0.5× to 2× in 0.01 steps. Presets provide a quick starting point, while the precise control helps match narration to a target length. The estimated result time updates before processing.
When speed adjustment helps
Speed up a lecture or meeting review, slow down fast instructions, or fit a voice-over into a video segment. A setting above 1× shortens playback; a value below 1× makes it longer. The original file remains available for comparison.
Quality and supported audio
The pitch-preserving process reduces the familiar high or low voice effect, though extreme speeds can still make speech or music sound less natural. MP3, WAV, M4A, and other common audio files are supported. Preview the result; all work happens locally in the browser.
Frequently asked questions
Will changing speed affect the pitch?
The tool preserves pitch to keep voices sounding natural.
What speed range is available?
Choose any speed from 0.5× to 2× in 0.01 increments.