Create smooth fade-in and fade-out transitions for your audio tracks. Perfect for intros, outros, and seamless transitions.
Supports MP3, WAV, OGG, FLAC and more
4 simple steps to get started.
Select the audio file you want to edit.
Choose the duration for the fade-in effect.
Choose the duration for the fade-out effect.
Download your audio with smooth fades applied.
Everything you need to edit audio — right in your browser.
Boost low-end frequencies to add depth and punch to your audio.
Merge multiple audio files into a single track seamlessly.
Convert between MP3, WAV, OGG, FLAC, and more formats.
Increase or decrease the volume of your audio files.
Speed up or slow down audio without changing the pitch.
Add smooth fade-in and fade-out effects to your tracks.
Record audio directly from your microphone in the browser.
Adjust bass, treble, and mid frequencies to fine-tune sound.
Reverse any audio file instantly for creative effects.
Create custom ringtones from any audio file you have.
Remove background noise and clean up your audio recordings.
Extract audio tracks from video files quickly and easily.
Shift the pitch of audio up or down without changing speed.
Reduce dynamic range for consistent, polished audio levels.
Remove vocals from songs to create karaoke or instrumental tracks.
Split audio files into equal or fixed-length segments.
Everything you need to know about fade in / out.
Create smooth fade-in and fade-out transitions for your audio tracks. Perfect for intros, outros, and seamless transitions. No downloads, no sign-ups, and no accounts. Editing and preview run locally in your browser using the Web Audio API; exporting sends your file over an encrypted connection to our processing server, which deletes it as soon as your download finishes.
Simply upload your audio file — MP3, WAV, OGG, FLAC, or M4A — and use our intuitive editor to make your changes. Upload audio, Set fade-in, Set fade-out, Export. Once you're satisfied, export the result in your preferred format instantly.
Whether you're a podcaster, musician, content creator, or just someone who needs a quick audio edit, Fade In / Out is built for you. It works on any device — desktop, tablet, or mobile — across all modern browsers including Chrome, Firefox, Safari, and Edge.
A cut in the middle of audio leaves a step in the waveform. The signal jumps instantly from silence to whatever level the audio happened to be at, and your ears register that discontinuity as a click or a thump. It is not a fault in the file, it is physics: an instantaneous change contains energy across the whole frequency spectrum, which is exactly what a click is.
A fade removes the step by ramping the level over a short window, so there is no instant jump for your ear to catch. That is the whole mechanism. Fade in ramps up from silence at the start; fade out ramps down to silence at the end. You set each duration independently, so a clip can open abruptly and close gently, or the reverse.
The MP3 Cutter has fade toggles built in that apply a half-second ramp at the edges of whatever you trimmed, which covers the common case in one step. The Ringtone Maker has the same, and fades matter more there than almost anywhere else: a ringtone starting with a click is far more noticeable than a click buried in a longer clip. The Audio Joiner's crossfade is a related idea applied to a join rather than an edge — the outgoing track fades down while the incoming one fades up.
Use this dedicated tool when you want a specific duration rather than the built-in default, or when you are fading a file you are not otherwise trimming. Preview happens locally; the fade is rendered on the server at export and the file is deleted straight afterwards.
Everything you need to know about Fade In / Out.