Audio Fade In/Out
Add fade in and fade out effects to your audio.
Drop your Audio file here
or click to browse · max 500 MB
Settings
FFmpeg WASM (~25MB) will be downloaded on first use and cached by your browser.
Audio Fade In/Out
Add smooth fade-in and fade-out effects to audio files. Set custom durations for each fade. Perfect for creating professional-sounding intros and outros.
What is it used for?
- Adding professional fade-in/out to music tracks
- Creating smooth transitions for podcast intros and outros
- Fading out recordings that end abruptly
- Adding gradual fade-in to eliminate recording start noise
Step-by-Step Guide
- Upload your audio file
- Set fade-in duration in seconds (0 to skip)
- Set fade-out duration in seconds (0 to skip)
- Click 'Convert to .MP3'
- Preview the result with fade effects
- Download the processed audio
How it works
Upload an audio file, set fade-in and fade-out durations in seconds, and click Convert. FFmpeg's afade filter applies smooth volume transitions at the start and end of the audio.
Tips & Best Practices
- 2-3 second fades work well for most content
- Use longer fades (5+ seconds) for cinematic music endings
- A 1-second fade-in can eliminate recording start clicks
Frequently Asked Questions
Can I use fade-in without fade-out?
Yes, set either value to 0 to skip that fade effect. You can use fade-in only, fade-out only, or both.
What's a good fade duration?
1-2 seconds for speech, 3-5 seconds for music. Longer fades feel more gradual and cinematic.
Privacy & Security
This tool uses FFmpeg compiled to WebAssembly (WASM). The WASM binary (~25MB) is downloaded from a CDN on first use and cached by your browser. All file processing happens locally on your device - your files are never uploaded to any server. This makes it safe for sensitive, private, or confidential media files. Large files may take longer to process depending on your device's CPU and available memory.