Add Fade In and Fade Out to Audio Online Free
Apply smooth fade in at the start and/or fade out at the end of any audio file for a professional finish.
Why Add Fades to Audio?
A fade-in gradually increases the volume from silence to full level at the beginning of an audio file. A fade-out gradually decreases the volume from full level to silence at the end. These simple effects make an enormous difference to how professional a recording sounds, eliminating the jarring abruptness of audio that starts or stops at full volume.
When to Use Fade In
- Podcast intros — Instead of starting abruptly, let the music or voice gently rise from silence to full volume over 1 to 2 seconds.
- Background music — Background music that fades in over 3 to 5 seconds sounds polished and intentional.
- Avoiding clicks — A very short fade-in of 10 to 50 milliseconds eliminates clicks at the very start of a recording caused by microphone handling noise or edit points.
- Waking listening — Alarm and notification sounds benefit from a gentle fade-in to avoid startling the listener.
When to Use Fade Out
- Song endings — Many pop songs use a fade-out ending where the music gradually diminishes to silence over 5 to 15 seconds.
- Podcast outros — Background music fading out under the closing words sounds much more professional than a hard cut.
- Ringtone endings — A short fade-out on a ringtone prevents the abrupt cut when it loops or stops.
- Transition effects — Fade out one clip before fading in the next for a smooth crossfade-style transition.
Fade Duration Guidelines
For music: fade-outs of 5 to 15 seconds are standard. For podcast music: 1 to 3 second fades work well. For click removal: 10 to 100 milliseconds is usually sufficient. For alarm sounds: 0.5 to 1 second fade-in is gentle but noticeable. Experiment with different fade durations to find what suits your content.
Fade Curves
A linear fade changes volume at a constant rate. A logarithmic (exponential) fade sounds more natural to human ears because human hearing is logarithmic — a linear fade sounds like it speeds up at the end. Our tool uses a smooth logarithmic curve by default for the most natural-sounding results.
How it works
- Upload your audio file (MP3, WAV, FLAC, OGG, AAC, or M4A).
- Set the Fade In duration in seconds (or 0 for no fade in).
- Set the Fade Out duration in seconds (or 0 for no fade out).
- Click Apply Fade to process the file.
- Download your audio file with fades applied.