Audio Speed Changer - Free Offline Tool (No Upload)
Change audio playback speed in your browser. 100% offline - no upload, no account, no data sent to any server. Free.
No Upload
100% Private
Free
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Loading Audio Processing Engine
Uses FFmpeg.wasm. First use downloads ~25MB (cached after).
Initializing...
Drop your audio file here
or click to select an audio file
Processing audio...
Speed-Changed Audio
Frequently Asked Questions
Why change audio speed?
Speed up podcasts or audiobooks for faster consumption, or slow down music for learning and practice.
Does this tool work offline?
Yes. FFmpeg.wasm runs entirely in your browser. Your files never leave your device.
Will the pitch change when I change the speed?
No. The atempo filter adjusts speed while maintaining the original pitch, so your audio sounds natural.