Add Fade to Audio Online
Add a fade-in, fade-out, or both to any audio file in your browser. Smooth intros and outros for podcasts, music, voice-overs, and more — no sign-up, no upload.
Add a Fade in 3 Steps
No account. No upload. Just drop your audio and set a fade length.
Upload the Audio
Drag and drop any audio file onto the tool or click to browse. Any format, mono or stereo, up to 200 MB.
Set Fade Durations
Type a fade-in value, a fade-out value, or both — or hit a preset like 3s / 3s for instant common lengths.
Download the Faded MP3
Click Apply Fades & Download MP3. The faded audio is encoded at 192 kbps and saved straight to your device.
Why Notevibes Audio Fade
Simple fade-in and fade-out controls, with a visual envelope preview.
Fade In Control
Dial in any fade-in length from a short quarter-second lift to a long 30-second swell. The volume rises smoothly from silence at a constant rate.
Fade Out Control
Set a precise fade-out so your track, podcast, or voice-over ends gracefully instead of cutting off. Combine with fade-in for a fully polished clip.
Linear Envelope
A clean linear gain ramp — the most predictable fade curve. No surprises, no pumping, no artifacts — just a steady rise or fall in volume.
Preset Shortcuts
One-click presets for 1s / 1s, 3s / 3s, 5s / 5s, fade-in only, and fade-out only. Instantly grab the most common fade lengths without typing.
Privacy First
Your audio is processed locally in your browser using the Web Audio API. Nothing is uploaded, stored, or tracked — the file never leaves your device.
Works on Mobile
Add fades on your phone or tablet. Runs on iOS, Android, Chrome, Firefox, Safari, and Edge — no app install, no account, no upload.
Your Audio Stays on Your Device
Every file is faded locally in your browser using the Web Audio API. Nothing is uploaded, stored, or analyzed.
No Upload
Audio never leaves your device
No Account
Start fading immediately
No Tracking
We never see your file
What You Can Do With Audio Fades
Fade-in and fade-out are the fastest way to make any audio sound polished.
Smooth song intros
Add a gentle fade-in to any track so the first note rises out of silence instead of punching in cold
Podcast outros
Fade the music bed under your closing lines and let the episode dissolve into silence like a pro production
Voice-over fade-in
Soften the start of a narration clip so the first word does not clip or sound jarring on playback
Music-to-speech crossfade
Fade out a music intro and follow it with a spoken voice-over to create a smooth handoff between segments
Radio-style fade-out
Apply a 5-second fade-out to give your track the classic radio ending that hands cleanly into the next segment
Gentle voice memo endings
Quickly fade out a phone recording or voice memo so it ends softly instead of with an abrupt stop
Need More Than a Fade Tool?
The full Notevibes Online Audio Editor lets you trim clips, mix multiple tracks, crossfade between songs, normalize loudness, apply voice EQ, and export to MP3 or WAV — all in your browser.
Open Full Audio EditorRelated Audio Tools
More free browser audio tools from Notevibes — no sign-up, no upload.
Frequently Asked Questions
How do I add fade in or fade out to audio online?
Drop your audio onto the Notevibes Add Fade to Audio tool above, type the fade-in and fade-out duration in seconds (or tap a preset like 3s / 3s), then click Apply Fades & Download MP3. Everything runs entirely in your browser — no upload, no sign-up, no wait.
Can I add fade in and fade out at the same time?
Yes. Set both values and the tool applies them in a single export. 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?
This tool fades a single file. For crossfading between two tracks, use the full Notevibes Online Audio Editor — drag two clips onto the timeline, overlap them, and the built-in fades blend the files into a natural crossfade you can 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, music intros, and outros. If you need equal-power or exponential fades for a DJ-style crossfade, use the full audio 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 each side can fade for up to 30 seconds, but most polished intros and outros only need 1 to 5 seconds.
Is it free?
Yes. The Notevibes fade tool is completely free, with no sign-up, no watermark, no ads, and no limit on how many files you can fade. Max file size is 200 MB per upload.
Is my file uploaded?
No. The fade tool runs 100% in your browser using the Web Audio API. Your file never leaves your device — nothing is uploaded, stored, or analyzed. You can even disconnect your internet connection after the page loads.
Does it work on mobile?
Yes. It runs on iOS and Android in Chrome, Firefox, Safari, and Edge. Tap to upload a file, type the fade duration or pick a preset, then tap Apply Fades & Download MP3 — that is all it takes.