Fade In / Out
Add a smooth fade-in and fade-out to audio and download it as WAV — in your browser, nothing uploaded.
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Drop an audio file to fade it
MP3, WAV, M4A, OGG…
Add an audio file to begin.
How to use
- Drop an audio file in, or tap the box to choose one.
- Set how long the fade-in and fade-out should last.
- Press Apply fade & download to save the result as a WAV.
FAQ
Is my audio uploaded anywhere?
No. The file is decoded and processed entirely in your browser with the Web Audio API. It never leaves your device, so it works offline and stays private.
What’s the difference between Smooth and Linear?
A linear fade changes the volume in a straight line. A smooth fade follows a gentle S-curve (raised cosine), which usually sounds more natural to the ear — especially for music.
Which formats can I use?
Any format your browser can decode (MP3, WAV, M4A/AAC, OGG). The result is saved as a lossless WAV; convert it to MP3 with the Audio Converter if you need a smaller file.