Audio Speed & Tempo Changer — Adjust Audio Playback Rate
Speed up lectures, slow down language learning tracks, and adjust music tempo directly in your browser.
Runs in your browser. Your files never leave your device. See how to check
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How to do it
- 1Choose your settings
Fill in the details or pick the options you need.
- 2See the result
The preview updates right away as you change things.
- 3Download or save it
Save the result to your device. Nothing is sent to or stored on a server.
About this tool
Change audio tempo from 0.25x (super slow motion) to 3.0x (high-speed scrubbing). Perfect for transcribers, language learners, podcasters, and musicians. Features quick preset buttons (0.5x, 0.75x, 1.25x, 1.5x, 2.0x), real-time playback, and offline WAV rendering.
Tips for best results
Take a moment to read the options before you start, and try the tool with a small sample first. Everything runs in your browser on your own device, so nothing you type or add is uploaded, and closing the tab clears it. If something does not look right, reload the page and try again, or use the report link on this page to tell us what went wrong so we can fix it. If a result still looks wrong, change one value at a time to see which box matters most. Bookmark this page if you will need the tool again.
Quick facts
- Category: Everyday Tools
- Works in your browser, no sign-up, no upload.
- Your input stays on your device.
- Available in many languages.
- Content last reviewed:
Frequently asked questions
What speed ranges are supported?
You can fine-tune tempo from 0.25x (quarter speed) up to 3.0x (triple speed).
Can I use quick preset speeds?
Yes, one-click preset buttons are available for 0.5x, 0.75x, 1.25x, 1.5x, and 2.0x.
How does the exported audio sound?
It renders an uncompressed 16-bit PCM WAV file ensuring crisp, clear playback without audio compression artifacts.
Is there a duration or file size limit?
No, you can process songs, podcast episodes, or long voice recordings right on your device.