Change audio speed (keep pitch)
Make audio faster or slower while voices and notes keep their pitch, for practice, podcasts and lectures.
Drop an audio file
or drop it here, or paste. Up to 500 MB per file.
Runs in your browser. Your files are not uploaded.
Formats: the format list shows only what this browser can encode. MP3 and FLAC use an encoder that downloads the first time you choose them. M4A (AAC) is not available in every Firefox version.
Memory: audio is decoded in full, about 23 MB per minute of 48 kHz stereo, so long recordings can be slow on phones. Files that would need more than about 1 GB once decoded (about 45 minutes of 48 kHz stereo, or 90 of mono) are refused before decoding.
How to use Change audio speed (keep pitch)
Choose an audio file or drop it on the page.
Enter the speed as a multiple, from 0.5 to 2.
Pick the output format.
Select Apply, then download the result.
Questions
No. Everything runs in your browser and the file never leaves your device.
No. Voices and notes keep their pitch. To change pitch with speed, like a tape, use the speed tool.
From 0.5x to 2x.
Related tools
- Change audio volumeMake audio louder or quieter by a number of decibels.
- Normalize audioSet the loudness to -14, -16 or -23 LUFS for streaming, podcasts or broadcast, or bring the loudest peak to a level.
- Fade audio in and outAdd a smooth fade in at the start and a fade out at the end.
- Change audio speed and pitchPlay audio faster or slower. Pitch changes with speed, like a tape.