What is Audio Fade In and Fade Out?

Fade In gradually increases audio volume from zero at the beginning, while Fade Out smoothly reduces volume to silence at the end of a track.

Which curve type is recommended?

S-Curve (Cosine) is the most natural-sounding curve that matches human ear perception.

Yes! YupVox Audio Fader is 100% free and processes audio in-browser.

Grátis · No Installation

Audio Fade In & Fade Out Online (MP3 Fader)

Smoothly fade in intro and fade out outro for audio tracks, songs, podcasts, and video soundtracks with studio precision.

Click to upload or drag & drop audio file

Supports MP3, WAV, M4A, OGG, AAC (100% in-browser private)

Key Features

Dual Fade Sliders

Fine-tune Fade In and Fade Out durations independently from 0.1s to 15s.

S-Curve & Exponential Modes

Choose between natural S-Curve, Linear, and Exponential volume transitions.

Visual Envelope Waveform

Waveform overlay displays live fade envelopes directly on the timeline.

How to Use

Upload audio file

Select or drag & drop any MP3, WAV, M4A, OGG, or AAC file.

Adjust fade durations

Slide Fade In and Fade Out time markers and pick your preferred curve.

Download faded audio

Click Download to receive your smooth, fade-enhanced audio track.

Online Audio Fade In & Fade Out Tool (MP3 Fader) Free

Need to create a smooth, gentle audio intro (Fade In) or a gradual outro fading to silence (Fade Out) for your podcasts, video soundtracks, or music tracks? YupVox Free Online Audio Fader lets you customize fade duration and curves (S-Curve, Linear, Exponential) with instant in-browser playback preview.