Video Compressor
Re-encode a small video as MP4 using an adjustable quality level.
Video & audioVideo & audio tools
Audio Speed Changer
Change playback speed while retaining the original pitch.
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How to use audio speed changer
- Choose a supported audio source up to 50 MB.
- Set Speed multiplier from 0.5 to 2 and select Process media.
- Compare duration and listening quality before downloading the MP3.
Work through an example
Choose a speed multiplier, calculate the approximate duration change, and review a pitch-preserving MP3 export.
Change audio tempo while keeping the pitch recognizable →Formats, privacy, and practical limits
Desktop browsers recommended. Maximum input 50 MB. First use downloads a roughly 32 MB processing engine. Processing can be slow and memory intensive; keep this tab open. Output size reduction is not guaranteed.
Files and generated results exist only for this tab session. Download any result you want to keep before leaving the page. Browsers may use temporary memory or disk cache while processing.
Frequently asked questions
How does speed affect duration?
Approximate output duration equals the original duration divided by the multiplier. At 1.25, a 100-second source becomes about 80 seconds.
Is pitch changed with speed?
The workflow uses a pitch-preserving tempo filter, though large changes can still introduce audible artifacts.