About this tool
About Audio Speed Changer
Change audio playback speed from 0.5× to 2× while preserving pitch. Preview the newly timed MP3 before downloading it.
This tool is available for browser processing. The main operation runs on your device when supported by the browser and selected format.
When to use Audio Speed Changer
Use it to speed up a lecture, slow down a language lesson, create a podcast preview, or fit a recording into a fixed video duration. Speed changes affect timing and pitch behavior, so listen to the full export before publishing.
How to use this tool
- Add the audio file and wait for its duration to load.
- Choose a faster or slower playback rate.
- Preview speech, music and transitions to make sure the change sounds natural.
- Export the new version and verify its duration and playback before replacing the source.
Speed changes and privacy
Audio output depends on the source codec, sample rate, channels, bitrate and selected format. Long recordings use browser memory during decoding and encoding, so preview the export and keep the original. Supported processing runs locally in the browser when available.
Related audio tools
Use Audio Cutter to remove content, Audio Volume Booster to correct level, or Audio Mixer when multiple tracks need timing and arrangement.