Change the playback speed of your audio files. Speed up or slow down without affecting pitch.

Free Online Audio Speed Changer

The MP3-AI.com Audio Speed Changer allows you to adjust the playback speed of any audio file directly in your browser. Using the HTML5 audio element's built-in playbackRate property, you can speed up audio to 4x for quick listening or slow it down to 0.25x for detailed analysis, all without changing the pitch of the recording.

This tool is invaluable for language learners who need to slow down native speech for better comprehension, music students practicing along with recordings at reduced speed, podcasters who want to speed up content review, transcriptionists working through long recordings, and audiobook listeners who prefer faster playback. The nine preset speeds cover a wide range from quarter speed to quadruple speed.

The speed changer works with all major audio formats supported by your browser including MP3, WAV, OGG, AAC, and M4A. The audio progress bar lets you scrub to any position in the file while maintaining your selected speed. All processing is done locally using your browser's native audio capabilities, so your files are never uploaded anywhere.

Unlike many online speed changers that require uploading files to a server for processing, our tool plays audio in real time at the selected speed. This means instant speed changes with no waiting, no file size limits, and complete privacy. The intuitive interface with visual speed selection buttons makes it easy to find the perfect playback rate for any situation.