Add Fade In and Fade Out to Audio - Free
Smooth the start or end of your audio so it does not begin or stop abruptly. A fade in ramps from silence to full volume. A fade out ramps from full volume to silence. Use them on intros, outros, or at edit points to eliminate clicks.
Smooth the start or end of your audio so it does not begin or stop abruptly. A fade in ramps from silence to full volume. A fade out ramps from full volume to silence. Use them on intros, outros, or at edit points to eliminate clicks.
Problems This Tool Solves
My audio clip starts or ends abruptly and sounds unprofessional
Apply a 0.5–2 second fade in at the start and fade out at the end. Even a very short fade makes a clip sound intentional.
There is a click at my edit point after cutting
Apply a 10–50 ms micro-fade at the edit join. This is invisible to the listener but eliminates the pop caused by cutting at a non-zero sample.
My fade out drops off too quickly at the end
Switch from linear to logarithmic curve. Logarithmic fades drop fast then taper slowly, matching how human hearing perceives volume changes.
Common Use Cases
Smooth a podcast intro/outro
Fade in the theme music over 2–3 seconds at the start, and fade it out under the host’s voice at the end.
Eliminate clicks at a cut point
A 10–50 ms micro-fade at an edit join removes the pop caused by cutting at a non-zero sample.
Create a gentle ringtone start
A 1–2 second fade in prevents the ringtone from jolting the listener.
End a song excerpt cleanly
Instead of a hard stop, a 3–5 second fade out makes a shortened clip sound intentional.
DJ-style transitions between tracks
Fade out the end of one track and fade in the start of the next after merging. Overlapping the fade regions creates a crossfade effect.
How to Add Fade to Audio Online
- Upload your audio file to the editor.
- Select the region where you want the fade. For a fade in, select the beginning. For a fade out, select the end.
- Choose your curve type (linear, logarithmic, or exponential) and click Fade In or Fade Out.
- Preview the result. Export when the transition sounds smooth.
Fade vs Trim - Different Purpose
Fade
Changes the volume over time without removing any audio. The audio is still there, just quieter at the edges.
Best for: smooth transitions, professional-sounding edges, eliminating clicks at edit pointsTrim
Removes audio permanently. Everything outside the selection is deleted.
Best for: shortening a file, isolating a section, cutting dead airRecommended Fade Lengths
| Purpose | Duration | Curve |
|---|---|---|
| Fix a click at a cut point | 10–50 ms | Linear |
| Smooth a voice clip edge | 0.5–1 second | Linear or logarithmic |
| Podcast intro music | 2–3 seconds | Logarithmic (natural feel) |
| Song ending / outro | 3–10 seconds | Logarithmic (drops fast, then tapers) |
| Alarm / ringtone start | 1–2 seconds | Exponential (builds slowly) |
Quick Tips
- Apply fades after trimming, not before. Trimming can remove your fade if it falls outside the selection.
- Logarithmic fades sound most natural because they match how human hearing perceives volume changes.
- For editing joins, a 10–50 ms micro-fade is invisible to the listener but eliminates clicks.
- You can apply a fade in at the start and a fade out at the end of the same file. They are independent operations.
Common Misconceptions
Myth: Linear fade is always the best choice
Reality: Logarithmic fades sound most natural for music and speech because they match human hearing perception. Linear is fine for short editing fades, but logarithmic is better for audible fade-outs.
Myth: Fading removes audio from the file
Reality: Fading changes the volume over time but does not remove any audio data. The content is still there, just quieter at the edges. Trimming is what removes audio.
Common Problems and Fixes
The fade sounds too abrupt
The selected region is too short. Extend your selection to cover a longer duration. 2–5 seconds is a good starting point for audible fades.
There is still a click at the edge
The fade may not extend all the way to the exact edge of the audio. Zoom in and make sure your selection starts at the very first sample (or ends at the very last).
Fade made the audio too quiet
Check that you faded the correct region. A fade out applied to the beginning of the file would silence the start. Undo and apply the correct fade direction.
Why Use This Add Fade In and Fade Out to Audio
- Three curve types: linear, logarithmic, and exponential
- Apply to any selected region, from a few milliseconds to the full file
- Fade in and fade out are separate operations with independent curves
- Essential for professional-sounding intros, outros, and edit points
- All processing runs locally in your browser
Frequently Asked Questions
Which fade curve should I use?
Linear is reliable for most cases. Logarithmic sounds most natural for music fade-outs because it drops fast then tapers slowly, matching how we perceive volume. Exponential builds slowly and works well for dramatic fade-ins.
How long should my fade be?
For click removal at cut points: 10–50 ms. For voice clips: 0.5–1.5 seconds. For music intros/outros: 3–10 seconds. When in doubt, 2 seconds is a safe default.
Can I apply both fade in and fade out to one file?
Yes. Select the beginning and apply Fade In, then select the end and apply Fade Out. Each is an independent operation.
Should I fade before or after compression?
Apply fades after compression and other processing. Compression can change the shape of a fade, so fading last gives the cleanest result.
Why does my audio clip sound unprofessional without fades?
A hard audio cut that starts or ends abruptly signals amateur production. Even a very short fade (0.5–1 second) smooths the transition and makes a clip sound intentional and polished.
What is an S-curve fade?
An S-curve starts slowly, accelerates in the middle, and slows down again at the end. It produces the smoothest possible transition and is used in high-end production. Linear and logarithmic curves cover most use cases, but S-curve is worth trying for critical transitions.
What is the difference between Constant Power and Constant Gain crossfade?
Constant Gain fades one track down while the other fades up linearly - the midpoint is quieter. Constant Power compensates so the midpoint stays at the same perceived volume. Constant Power sounds smoother for most transitions. This tool does individual fades, not crossfades - apply a fade out to the end of one clip and a fade in to the start of the next after merging.