Add Fade to Audio Online
Add a fade-in, fade-out, or both to any audio file right in your browser. Smooth intros and outros for podcasts, music, and voice-overs — no sign-up, and your file is never uploaded.
How to Add a Fade to Audio
No account, no upload — three steps on your own device.
Drop Your Audio
Any format — MP3, WAV, M4A, FLAC, OGG, AAC, WebM, OPUS — up to 200 MB. The waveform renders as soon as it decodes.
Set the Fades
Type a fade-in, a fade-out, or both — or tap a preset like 3s / 3s. The envelope updates live on the waveform.
Preview & Download
Hit Apply Fades to preview the result, then Download MP3 straight to your device — no queue, no watermark.
Why Notevibes Audio Fade
Fade tools make you upload and wait. This one doesn’t.
Fade In Control
Dial in any fade-in length, from a quarter-second lift to a long swell. The volume rises smoothly from silence at a steady rate.
Fade Out Control
Set a precise fade-out so a track, podcast, or voice-over ends gracefully instead of cutting off. Combine both for a fully polished clip.
Live Envelope Preview
The waveform dims to match the fade you set, and a curve traces the exact gain ramp — so you see the fade before you apply it.
One-Click Presets
Presets for 1s / 1s, 3s / 3s, 5s / 5s, fade-in only, and fade-out only grab the most common lengths without typing a number.
Never Uploaded
Fades are computed in your browser and the file never leaves your device. Nothing is uploaded, stored, or tracked.
Free, On Any Device
No watermark, no sign-up, no daily limit. Runs on iOS, Android, and every major desktop browser.
Nothing to Upload, Nothing at Risk
Every fade is computed on your own device. Your file never touches a server — a stronger promise than any deletion policy.
No Upload
Decoding and fading run on your device
No Account
Start fading immediately
No Tracking
We never see your file
What People Fade
Fade-in and fade-out are the fastest way to make any audio sound polished.
Smooth Song Intros
Let the first note rise out of silence instead of punching in cold
Podcast Outros
Fade the music bed under your closing lines so the episode dissolves
Voice-Over Fade-In
Soften the start of a narration so the first word never clips
Music-to-Speech Handoff
Fade out an intro and hand cleanly into a spoken voice-over
Radio-Style Fade-Out
A 5-second fade gives a track the classic radio ending
Gentle Memo Endings
Fade out a voice memo so it ends softly instead of stopping dead
A Clean Start and a Soft Ending
A track that punches in cold or stops dead sounds unfinished. A fade fixes both in seconds — but most fade sites make you upload the whole file first. Here the audio never leaves the tab. Drop it in, set a fade-in and fade-out, and your browser draws the volume envelope right over the waveform so you can see the result before you commit.
See the fade, then hear it
As you type a duration or tap a preset, the waveform dims to match and a curve traces the exact gain ramp. Hit Apply Fades and a preview player appears, so you confirm it sounds right before downloading — no blind export, no guessing.
The simplest curve, on purpose
The tool applies a linear fade — volume rising or falling at a constant rate. It’s the most predictable curve and the right choice for podcasts, voice-overs, music intros, and outros. Each side can run up to half the clip, so the fade-in and fade-out never collide, and the result exports as an MP3 at the bitrate you pick.
Fade out a song without an editor
Often all you want is for a song to fade out, and opening a full editor for that is overkill. This page works as a simple online audio fader: drop the track in, set the fade-out length, download. It covers the classic music jobs in one pass — a radio-style edit that fades out before the final chorus, a DJ mix that ends clean instead of stopping mid-beat, and looping background music that needs a soft seam. And it isn’t music-only: any sound, from a sound effect to a field recording, fades out the same way.
Private because it never leaves
The whole fade runs on your device, so there’s no upload time and nothing to gate behind a sign-up. It’s free with no watermark and no daily cap — fade as many files as you want, in any common format.
When a fade isn’t enough
Need to trim the clip first? The audio trimmer cuts to any length the same no-upload way, and the ringtone maker frames a 30-second tone. Stitching several clips together? Use the audio joiner. For crossfades between two songs, EQ, and AI cleanup, open the online audio editor.
Need to Do More Than Fade?
The full Notevibes editor trims, joins, crossfades between tracks, mixes, and applies AI tools to your audio — then exports to MP3 or WAV.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Audio Fade FAQ
How do I add fade in or fade out to audio online?
Drop your audio onto the fade tool above, type the fade-in and fade-out duration in seconds (or tap a preset like 3s / 3s), then click Apply Fades. Preview the result and download the MP3. Everything runs in your browser — no upload, no sign-up.
What is a fade in and fade out in audio?
A fade-in gradually raises the volume from silence at the start of a clip; a fade-out gradually lowers it to silence at the end. Both are smooth gain ramps that replace abrupt starts and hard cuts, preventing clicks and making a track, podcast, or song feel finished.
Can I add fade in and fade out at the same time?
Yes. Set both values and the tool applies them in a single pass. The only limit is that the combined fade length must be shorter than the clip — each side can be up to half the total duration.
How do I crossfade between two audio files?
A crossfade blends two tracks by overlapping them — track A fades out while track B fades in, so there is no gap or hard cut. To build one, fade out the end of the first track and fade in the start of the second with this tool, then overlap them. This page handles the fades; for the overlap itself, use the full Notevibes online audio editor — drag both clips onto the timeline, slide them together, and export as MP3 or WAV.
What kind of fade is applied?
A linear fade — the volume rises or falls at a constant rate. Linear is the most predictable curve and works well for podcasts, voice-overs, and music intros and outros. For equal-power or exponential fades, use the full editor.
How long can the fade be?
Each side can be up to half the total duration, so the fade-in and fade-out never overlap. For a 60-second clip that means up to 30 seconds each side, but most polished intros and outros only need 1 to 5 seconds.
What formats can I fade, and what is the output?
Drop MP3, WAV, M4A, FLAC, OGG, AAC, WebM, or OPUS up to 200 MB. The result exports as an MP3 at the bitrate you choose (64–320 kbps, 192 by default).
Is my file uploaded to a server?
No. The fade tool runs entirely in your browser using the Web Audio API. Your file never leaves your device — nothing is uploaded, stored, or analyzed.
Is it free, and does it work on mobile?
Completely free — no sign-up, no watermark, no ads, and no limit on files. It runs on iOS and Android in Chrome, Firefox, Safari, and Edge.