Add Fade In & Fade Out to Audio

Upload your audio file, set the fade in duration (applied to the start) and fade out duration (applied to the end), choose a curve type, and download. The tool processes everything in your browser instantly.

Four options. Linear changes volume at a constant rate. Exponential starts slow and accelerates. Logarithmic starts fast and slows down. S-curve eases in and out for the smoothest transition. For speech, exponential or S-curve sounds most natural.

Yes. Set the fade out duration to 0 seconds to skip it. You can apply fade in only, fade out only, or both independently.

For music, 2-5 seconds is standard for fade outs. For podcast intros, 1-2 seconds is typical. For audio transitions in video editing, 0.5-1 second crossfades are common. The right duration depends on your content and how abrupt or gradual you want the transition.

Yes. Upload any MP3 file, configure your fade, and download the result as a lossless WAV. The tool decodes the MP3, applies the fade at the sample level, and exports without any additional compression.

No. Everything runs locally in your browser using the Web Audio API. Your audio file stays on your device. Nothing is uploaded, stored, or sent to any server.

Up to the full length of your audio file. A 30-second file can have a 30-second fade in (which would gradually increase volume across the entire track). Practical use cases rarely exceed 10 seconds.

Yes. Add your fade, download the WAV file, and import it into your video editor (Premiere Pro, DaVinci Resolve, Final Cut, CapCut). WAV files are compatible with every video editing tool.