Audio Speed Changer
Speed up or slow down audio and download the result as MP3. Runs in your browser.
How to change audio speed
Upload an audio file and choose a new speed — speed it up to get through a lecture or podcast faster, or slow it down to transcribe, learn a piece of music, or catch every word. The tool re-renders the audio at your chosen rate and gives you a file to download.
Common reasons to change playback speed
Speeding audio up saves time on long recordings, while slowing it down helps with transcription, language learning and music practice. Having a saved file at the new speed means you can play it anywhere, not just in a player with a speed control. Processing runs in your browser, so your audio is never uploaded.
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Frequently Asked Questions
How do I change audio speed?
Upload an audio file, choose a speed from 0.5x to 2x, process it, and download the result as MP3.
Does it change the pitch?
The speed filter preserves pitch better than simple playback-rate changes, though extreme values can still sound processed.
Which audio formats can I upload?
Common formats like MP3, WAV, M4A, AAC, and OGG work, and the output is always saved as MP3.
Is the audio uploaded?
No. Processing runs locally in your browser using FFmpeg WASM, so your file stays on your device.