Set a speed or a target length, preview it, and export MP3. No software to install.
Every file uses the same settings. Select a file to preview it and see its parts.
Enter how long you want the final audio to be. Playback speed will be calculated automatically.
Pitch moves with speed, like a record played faster or slower. This applies to the preview and to the exported files.
Off: files keep their original loudness.
| File | Start | End | Length |
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Loading MP3 encoder…
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Back to Audio ToolsAudioBypasser™ is a free, browser-based audio editor for changing playback speed. Upload one file or a batch, pick a speed or the length you want, preview the result, and export MP3. There is nothing to download or install.
Your browser decodes each file, resamples it to the new speed with cubic interpolation, and encodes MP3 with the open-source LAME encoder. Speeding up applies a low-pass filter first, so the result stays clean.
Everything happens on your device. Your audio is never uploaded, and your original files are never changed.
Type the length you want, such as 3:00 or 1:05:00. The speed is calculated as original duration ÷ target duration, separately for every file.
Pitch changes together with speed. Exports keep the original title, artist, album, cover and similar tags. MP3 adds a few hundredths of a second of standard encoder padding.