Fade in and fade out audio
Add smooth fade ins and fade outs to songs, podcast music beds and ringtones, with live preview of the curve.
Drop an audio or video file here
MP3, M4A, WAV, OGG, FLAC, MP4, MOV… — processed on your device, never uploaded
How it works
A fade changes volume gradually instead of instantly. A fade in eases the listener into a clip that starts mid-song; a fade out lets a cut ending feel finished instead of chopped. The dashed line on the waveform shows the gain envelope, so you can see exactly where each fade starts and ends.
The Smooth curve (a raised cosine) is the best general choice: it starts and ends gently, with no audible corner. Linear changes volume at a constant rate, which can sound like it drops off suddenly near the end because hearing is logarithmic. Exponential holds the level longer and then falls away quickly, which suits fade outs on music with a long sustain.
Fades are applied after volume and normalization, so the start and end of the clip always reach true silence. If the fade in and fade out together are longer than the selection, both are shortened proportionally.
Recommended settings
- Smooth curve for most material
- Fade out 2–4 s for songs, 1–2 s for ringtones
- 10–50 ms fades remove clicks without being noticed
- Preview with Loop on to judge the ending
Step by step
- Open your audio. Click Open file or drop an MP3, M4A, WAV, OGG, FLAC or video file onto the page. It is decoded in your browser and never uploaded.
- Select the part to keep. Drag across the waveform, drag the handles, or type exact start and end times. Use Find loudest part or a length preset such as 30 s for ringtones.
- Add fades and set the volume. Set fade in and fade out lengths, then tick Normalize or adjust Volume. Press Play to preview exactly what will be exported.
- Download. Choose MP3, WAV, M4A or M4R, type a name and click Download.
FAQ
How long should a fade out be?
For a song ending, 3–6 seconds. For a ringtone or short clip, 1–2 seconds. To just remove a click, 10–50 milliseconds.
What is the difference between linear and logarithmic fades?
A linear fade changes the amplitude evenly, which our ears hear as slow at first and then abrupt. Curved fades (smooth or exponential) sound more even because hearing works on a logarithmic scale.
Can I fade only the beginning?
Yes. Set Fade out to 0 and only the fade in is applied.
Are my files uploaded?
No. Audio is decoded, edited and encoded in your browser with the Web Audio API, WebCodecs and a JavaScript MP3 encoder. Nothing is sent to a server, so it also works on slow connections once the page has loaded.
Which formats can I open?
Anything your browser can decode: MP3, WAV, M4A/AAC, OGG Vorbis, Opus and FLAC, plus the audio track of MP4, MOV and WebM videos. Chrome and Edge support the widest range.