Add audio fade online - Fade in/out MP3
Add fade in and fade out effects to your audio files using Convertly Audio. 100% free, no signup.
Drag and drop your audio files
or click to select (MP3, WAV, FLAC, OGG, AAC, M4A)
Supported audio formats
How to use this tool
Step 1
Upload your audio file
Step 2
Configure fade durations
Step 3
Download with transitions
Guaranteed privacy
Processing done locally. Your audio files stay on your device.
Professional transitions
Avoid abrupt starts and endings with elegant fades. Ideal for presentations, podcasts, and video editing.
Add Fade without Quality Loss
Convertly Audio applies fades with professional audio precision, without recompressing the rest of the file. Original quality, bitrate, and format (MP3, WAV, FLAC, OGG, AAC, M4A) are 100% preserved.
Add Fade In & Fade Out for Free
No registration, no installation. Convertly Audio's fade tool is 100% free and works in any browser. Add fade in, fade out, or both to as many audio files as you need.
Precisely Customize Fade Durations
Define the exact fade in and fade out durations in seconds, with different curves (linear, logarithmic, exponential, S-curve, reversed S-curve). Ideal for smooth, professional transitions between tracks.
Professional Audio Fades Locally
Processing happens directly in your browser via FFmpeg WebAssembly. Your audio files are never sent to a server, guaranteeing total privacy and fast execution.
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Frequently asked questions
What fade duration do you recommend?
For the duration of an audio fade, a 2-3 second crescendo or decrescendo for an intro or outro often provides a natural, gradual transition, effectively managing the attack and release. Shorter fades, around 1 second, are typically sufficient for podcasts or quicker transitions to enhance the listening experience without abruptness.
What types of fades can I apply to my audio?
You can apply a fade in, fade out, or both. This gives your audio a smooth start and end, without any abrupt cuts.
Can I set the exact fade duration?
Yes, adjust the fade in and fade out durations independently, from a few milliseconds to several seconds, for fine control over the final sound rendering.
Do fades affect audio quality?
No, applying fades preserves the original audio quality. Our tool uses precise processing without additional recompression to maintain sound fidelity.