免费 · 无需安装
在线音频淡入淡出调节工具
为歌曲开头添加平滑淡入、结尾添加渐隐淡出 — 消除突兀开场与突然断音。
核心功能
自由调节淡化时长
精确设置淡入与淡出的秒数（如 1s - 10s）。
多种渐变曲线
支持线性、对数与 S 型平滑音量渐变。
实时动态预览
在声波图上直观看到音量渐变曲线。
使用指南
1
上传音频
选择需要添加淡入淡出效果的歌曲。
2
设置淡入淡出秒数
拖动滑块设置片头淡入与片尾淡出时长。
3
导出处理后的文件
试听渐变过渡效果并保存下载。
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.
Why Choose YupVox Online Audio Fader?
Dual Independent Faders
Set separate Fade In and Fade Out durations from 0.1s to 15s with millisecond precision.
Studio-Grade S-Curve Algorithms
Pick between natural S-Curve, Linear, and Exponential volume curves.
Live Waveform Envelope Overlay
Visual color-coded envelope zones display exactly where fading occurs on the timeline.
Lossless Export Quality
Processes audio in client-side RAM and exports crisp WAV or 320kbps MP3 without quality degradation.
How to Fade Audio In and Out in 3 Simple Steps
STEP 1
Upload audio file: Drag & drop or select your MP3, WAV, or AAC audio file.
STEP 2
Adjust fade durations: Slide the Fade In and Out controls to your desired duration and pick your curve.
STEP 3
Download faded audio: Click Download to receive your polished audio track with smooth intro/outro.
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