Start music gently without cutting the track

A fade-in gradually raises the opening from silence to its original level. This tool applies a linear fade to an MP3 or PCM WAV, leaving its duration unchanged. It does not normalize the track or remove background noise.

How to fade in audio

Choose an MP3 or PCM WAV, up to 30 MiB and ten minutes.
Set the opening fade duration. Try one second for a short cue or three seconds for a softer music entrance.
Choose MP3 or uncompressed 16-bit WAV. Check the estimated size before processing.
Create the audio, play both openings and download the result.

Choose a fade that fits the recording

The fade must fit within the track and cannot exceed 30 seconds. Long fades can hide the first words of speech or soften a musical attack more than intended. Keep the original, preview the opening and shorten the fade if the first phrase becomes hard to hear. Existing silence is included in the fade duration; it is not trimmed automatically.

Quality and file size

MP3 export is lossy. WAV stores the decoded audio as uncompressed PCM and usually needs more space; it does not recover detail lost in an MP3 source. A fade changes amplitude, not duration, so it will not materially reduce constant-bitrate MP3 size. See the file size calculator.

Fade-in questions

Can I fade out instead?

Use fade out audio for the ending. This page changes the opening only; combined entrance and ending controls are not offered here.

Will the middle and ending change?

The fade filter stops changing the level after the selected opening. Output encoding or resampling can still change samples across the track. A 48 kHz input stays at 48 kHz; other accepted sample rates export at 44.1 kHz.

Does it work without uploading?

Yes. Your browser downloads the engine, then processes your file locally. Keep the tab open and save the result before leaving.

Read the fade-in guide, compare fade-out choices, or browse all tools.

Fade In Audio