How it works

  1. Drop your audio file. MP3, WAV, FLAC, AIFF, OGG or M4A up to 500 MB — it's decoded locally, nothing is uploaded.
  2. Shape your fades on the waveform. Drag the top handles to set each fade's length, and bend the curve with the center handle — you hear the result in real time.
  3. Download the faded file. The export uses the exact same curves as the preview, in the same format as your source file.

Features

  • Real-time preview. The fades you hear while editing are computed with the same curves as the export — what you hear is what you get.
  • Bendable curves. Drag a handle to morph each fade from concave to linear to convex, Logic-style, or pick a named curve: Linear, Log (level changes evenly in dB) or S.
  • Same-format export. Lossless sources stay lossless (WAV, AIFF, FLAC); MP3, M4A and OGG are re-encoded at no lower bitrate than the source (320 kbit/s stays 320, VBR becomes VBR V0). You can also export to another format.
  • 100% in your browser. Your track never leaves your computer — processing runs locally with the Web Audio API and ffmpeg.wasm.

FAQ

Is this fade tool free?

Yes. Without an account you get 2 free uses per day across AudioKit's free tools; with a free account, 5 per day. Loading a file and tweaking the fades is always free: a use is only counted at the first download of the result, and downloading it again is free. AudioKit Premium removes the daily limit.

Is my audio file uploaded to a server?

No. The file is decoded, previewed and rendered entirely in your browser (Web Audio API + ffmpeg.wasm) and never leaves your machine. The only network call is a tiny anonymous counter that tracks your daily free quota.

Which audio formats are supported?

MP3, WAV, FLAC, AIFF, OGG and M4A files up to 500 MB. By default the result keeps the source format (you can pick another): lossless stays lossless at its original bit depth; MP3, M4A and OGG are re-encoded at no lower bitrate than the source (a 320 kbit/s MP3 stays 320 kbit/s, a VBR MP3 is re-encoded as VBR V0).

What fade duration should I use?

There's no universal rule, but good starting points: 1–3 seconds for a fade in, 5–15 seconds for a musical fade out at the end of a song, and well under a second for tightening the edges of a clip. The preview plays in real time, so the fastest way is to drag the handle and trust your ears.

Can I change the shape of the fade curve?

Yes. Drag the center handle up or down to bend each fade from concave (slow start) through linear to convex (fast start), like in Logic or other DAWs, or pick a named curve: Linear, Log (the level changes evenly in decibels) or S (gentle start and end). The exported file uses the exact curve you hear in the preview, and the fade-out always ends exactly on the last sample of the file.