Upload an audio file, choose a new speed from 0.5x to 2x, preview it live, and download the result.
Speeding up or slowing down audio is useful for podcast previews, voiceover timing adjustments, or fitting a track to a specific duration. This tool renders your audio at the chosen speed using the Web Audio API's OfflineAudioContext and exports it as a WAV file — no upload required.
Step 1 — Upload your audio file.
Step 2 — Drag the speed slider and preview live with the player.
Step 3 — Click Render & Download to save the final WAV file at that speed.
Expecting an MP3 output. This tool exports WAV (uncompressed) for reliability across all browsers — convert to MP3 afterward with your usual editor if needed.
Using very long files. Rendering happens in your browser's memory — for very long audio, expect a longer processing time.
Yes, this method changes speed and pitch together (like a turntable), which sounds natural for most speed adjustments within this range.
No, everything processes locally in your browser using the Web Audio API.