Apply fade in and fade out to audio files with linear or equal-power curves, 100% in browser.
The Audio Fade In/Out tool applies smooth volume transitions at the beginning and end of any audio file. Choose between equal-power curve (used in professional mixing) and linear curve. Processing uses the Web Audio API and happens 100% on your device.
Paste the code into your HTML and the tool shows up on your page, without J-Kit's navigation and ads. It still runs in the browser of whoever visits your site.
<iframe
src="https://jkit.tools/embed/en-US/audio-fade-in-out"
width="100%"
height="600"
style="border:0"
loading="lazy"
title="Audio Fade In/Out"
></iframe>These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
A linear fade reduces amplitude proportionally over time, simple, but can sound abrupt at the midpoint. Equal-power uses a sinusoidal curve that maintains a more constant perceived volume, ideal for professional mixdowns and crossfades.
Your file is processed locally in the browser. No data is sent to any server.