How to use this tool
- Drop in an audio file.
- Choose a speed and an output format.
- Click Change Speed and download the result.
Frequently asked questions
- Does the pitch change too?
- Yes — speeding up or slowing down shifts the pitch along with it, exactly the way changing the playback speed of a tape or vinyl record does. Real pitch-preserving time-stretching is a much more involved process this tool doesn't attempt.
- What speed range is supported?
- From 0.5× (half speed, lower pitch) up to 2× (double speed, higher pitch).
- What audio formats can I use?
- Any format your browser can decode as input. The output can be MP3, WAV, OGG, or FLAC.
- Is my audio uploaded anywhere?
- No — the speed change is applied entirely in your browser. Nothing is uploaded.
How GetByteRush compares
Most free tools for this online work the same way: you upload your file to their server, wait, then download the result — which means your file (and often your email, for a "free" account) sits on someone else's infrastructure. Here's the actual difference:
| Feature | GetByteRush | Typical online tools |
|---|---|---|
| Data ever leaves your device | No — processed in this tab | Yes, uploaded to process |
| Shows the resulting duration before you commit | Yes | Varies |
| Account required | Never | Often, past a certain usage level |
("Typical online tools" reflects publicly documented behavior of common free file-processing sites as of 2026 — always check a specific competitor's own privacy policy and pricing page, since these details change.)