How to Fade Out Audio Online in 3 Steps
- Upload the AAC file in the converter above.
- Set the fade out to 0.5, 1, 2, 3 or 5 seconds. Add a fade in too if the file starts abruptly.
- Convert and download the MP3 with the fade applied.
How Fade In/Out Works
A fade in gradually increases volume from complete silence to full level over a specified duration at the start of the audio. A fade out does the reverse — smoothly decreasing volume from full level to silence at the end. Together, they replace abrupt starts and stops with professional-sounding transitions.
The fade is a volume envelope applied directly to the audio samples before MP3 encoding. It does not alter frequencies, add compression artifacts, or change the tonal character of the sound — it only adjusts amplitude over time. The processing chain is: AAC decode → fade envelope → MP3 encoding.
For fade out, CleverUtils uses a reverse-fade-reverse technique: the audio is reversed, a fade in is applied to the beginning (which is actually the end of the original), then the audio is reversed back. This applies a perfect fade out without needing to probe the file duration first — an efficient approach that works regardless of file length.
Both fades are independent: You can set different durations for fade in and fade out, or use only one. A 1s fade in with a 3s fade out is a common combination for podcast episodes.
Fade Duration Guide
Choose the right fade duration based on your content type and use case:
| Duration | Effect | Best For | Notes |
|---|---|---|---|
| 0.5s | Quick cut softener | Sound effects, short clips, notification tones | Eliminates clicks without noticeable fade |
| 1s | Smooth transition | Podcast intros, voice recordings, ringtones | Recommended for most content |
| 2s | Gradual fade | Music tracks, streaming downloads, DJ sets | Natural-sounding for music content |
| 3s | Cinematic transition | Album tracks, presentation audio, video soundtracks | Long, gradual ending |
| 5s | Slow, dramatic fade | Ambient recordings, meditation audio, cinematic outros | Ensure your audio is long enough for the fade |
AAC Fade: Podcasts and Streaming Downloads
AAC is the default audio format for podcast feeds, Apple Music downloads, YouTube audio, and most streaming services. When you download or extract these files, they often start and end abruptly — the content was designed for seamless playback within a streaming app, not for standalone listening. Adding fade in/out during conversion to MP3 fixes these rough edges.
Podcast episodes benefit from a 1–2 second fade in to ease listeners into the content. Many podcast AAC files begin mid-sentence or with a sudden burst of intro music that can be jarring on headphones. A gentle fade in smooths the opening. For fade out, 2–3 seconds gives a clean ending instead of cutting off abruptly after the outro. To even out volume between episodes as well, read our guide to normalizing AAC podcasts to -16 LUFS.
Streaming music downloads from services like Apple Music or YouTube often have abrupt endings where the track was trimmed from an album master. A 2–3 second fade out provides a polished conclusion, particularly useful for individual tracks extracted from continuous mixes or live recordings. Fade in is less common for music but a 0.5–1 second fade eliminates any leading-edge clicks from the extraction process. To cut one track out of a longer mix before fading it, use our free audio cutter.
Podcast tip: Use 1s fade in + 2s fade out for individual episodes. For streaming music rips with abrupt endings, try 0.5s fade in + 3s fade out to preserve the original intro impact while smoothing the ending.
How to Fade Out Audio in Audacity, Premiere Pro and CapCut
If the audio is already part of an editing project, fade it there instead of converting it first.
Audacity
- Select the last few seconds of the track with the selection tool.
- Go to Effect → Fading → Fade Out.
- Export with File → Export Audio.
Premiere Pro
- Open the Effects panel and go to Audio Transitions → Crossfade.
- Drag Constant Power (smoothest), Constant Gain or Exponential Fade onto the end of the clip.
- Drag the edge of the transition to set its length.
CapCut
- Select the audio clip in the timeline.
- In the audio settings, move the Fade out slider to the length you want.
Fading out audio from a video
Editors such as Premiere Pro and CapCut fade the audio inside the video directly. To get a separate audio file with a fade, extract the audio track first, then add the fade here.
The fades on this page are linear: volume changes at an even rate from silence to full level, or from full level to silence.