Speed Changer
FreeChange playback speed without affecting pitch
speedtemposlowfastaudio
All Audio ToolsRelated tools
How it works
1
Upload
Add an audio file you want to speed up or slow down.
2
Adjust
Set the playback speed multiplier. Pitch is preserved automatically so voices sound natural.
3
Export
Preview and download the speed-adjusted audio. Processing runs locally in your browser.
Frequently asked questions
Does changing speed affect the pitch?+
No. The tool uses time-stretching algorithms that change speed independently of pitch. A sped-up voice sounds faster but stays at its natural pitch — no chipmunk effect.
What speed range is supported?+
You can set speed from 0.25x (four times slower) to 4x (four times faster). Extreme values may introduce minor artifacts, but typical ranges like 0.5x to 2x sound clean.
Is this useful for podcasts and audiobooks?+
Yes. Speeding up spoken-word content to 1.25x or 1.5x is common for faster listening. The pitch preservation ensures the speaker still sounds natural.
Are my files processed on a server?+
No. All speed processing runs in your browser using the Web Audio API. Your audio files never leave your device.