StudioWavePro — Online Audio Editor with 48+ Studio Tools

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StudioWavePro’s Fade tool ends abrupt starts and stops. Choose Fade in, Fade out, or Fade both, set a duration between 0.1 and 10 seconds, and the volume ramps smoothly from (or to) silence. The preview is smart about context: it plays just the affected end of the track — with a second and a half of the surrounding audio — so you judge the actual transition instead of re-listening to the whole file.

Fades are the single cheapest way to make edited audio sound finished. A half-second fade-in removes the click or breath at the start of a voice take; a three-second fade-out ends a song gracefully where a hard cut would feel broken. The tool keeps the duration sensible automatically — it can never exceed half the track length, so fade-in and fade-out can’t collide on short clips.

When to use

End a song or ringtone cleanly instead of cutting it off mid-note.
Smooth the start of a trimmed clip so it doesn’t pop or click.
Fade background music in and out around a voiceover.
Polish podcast segments so edits are inaudible.
Prepare loops and samples whose edges would otherwise click.
Soften the start and end of a long ambience or rain recording.

How to use

Click "Open Fade" below to launch the editor.
Drop in any audio file — MP3, WAV, OGG, M4A and FLAC are all supported.
Choose the type: Fade in, Fade out, or Fade both.
Set the duration with the slider (0.1–10 s). The preview plays the affected start or end of the track so you hear the exact transition.
Click Apply, then download as WAV or MP3.

Tips

Spoken word likes short fades (0.2–0.5 s); music endings usually want 2–5 s. The 2-second default is a good middle ground.
For a ringtone from a Trim selection: trim first, then "Fade both" at ~0.5 s makes the loop endpoints feel deliberate.
A fade-out hides background noise at the end of a take, but if the noise runs through the whole recording, fix it first (Hum Remover for mains hum, High Pass for rumble).
Drag the duration slider while the preview plays to compare lengths instantly — it restarts the affected region with each change.
Need a fade in the middle of a track (ducking under a voice)? Split with the Audio Splitter, fade the pieces, and rejoin — or use the Crossfade Joiner for overlapping transitions.

Frequently asked questions

How do I fade out a song online?: Open the Fade tool, drop in the song, choose "Fade out," set the duration (3 seconds is typical for music), preview the ending, click Apply, and download as MP3 or WAV. The whole process takes well under a minute.
How long should a fade in or fade out be?: For speech: 0.2–0.5 s, just enough to kill clicks and breaths. For music endings: 2–5 s feels natural. For ambience and background beds: as long as 5–10 s. There is no single right answer — the live preview is there to let your ears decide.
Can I add a fade in and fade out at the same time?: Yes — choose "Fade both" and one duration is applied to each end. The slider is automatically capped at half the track length so the two fades can never overlap.
What kind of fade curve does this use?: A linear ramp — volume rises or falls in a straight line over the duration. Linear fades are predictable and work well for the vast majority of material, especially at the durations used for intros and outros.
Why does my clip click or pop at the start, and will a fade fix it?: A click happens when audio starts mid-waveform at a non-zero level. Even a 0.1–0.2 s fade-in eliminates it completely, which is why pro editors fade the edges of nearly every cut.
Can I fade just a section in the middle of the track?: This tool fades the start and end of the file. For mid-track volume moves, split the file with the Audio Splitter, process the pieces, and rejoin with the Audio Merger or Crossfade Joiner — or use Mute Section if the goal is silencing a region.

StudioWavePro is a complete audio editor with 48+ studio-grade tools in one workspace. Trim, master, EQ, time-stretch, denoise, remove vocals, detect BPM and musical key, generate metronomes, and more. Editing tools

Audio Trimmer — crop a track to a selected region

Mute Section — silence a selected region

Reverse Audio — play the track backwards

Fade In/Out — ramp volume at start or end

Silence Trimmer — strip leading and trailing silence

Silence Gap Inserter — insert silence at a chosen position

Audio Looper — repeat a section N times

Audio Splitter — cut a track into multiple parts

Audio Merger — join multiple files end-to-end

Silence Splitter — auto-split at silent gaps

Crossfade Joiner — join clips with overlapping fades

Time and pitch

Speed Changer — speed up or slow down (with optional pitch preservation)

Pitch Shift — change pitch without changing tempo

Tempo Detector — estimate the BPM of a music track

Key Detector — estimate the musical key

Metronome Generator — create a click track at any BPM

Effects

Volume — make a track louder or quieter

Bass Boost — lift the low end

Treble Boost — lift the high end

Low Pass Filter — cut off high frequencies

High Pass Filter — cut off low frequencies (remove rumble)

Equalizer (3-band) — low / mid / high tonal shaping

Equalizer (10-band) — fine-grained tonal control

Echo — add repeating echoes / delay

Distortion — overdrive, fuzz, and lo-fi grit

Stereo Balance — shift the L/R center of a stereo mix

Stereo Widener — make stereo narrower or wider

Vocal Remover — karaoke (center-channel removal)

Hum Remover — strip 50/60 Hz mains hum

Mastering and analysis

Normalize — maximize volume without clipping

Compressor — even out loud and quiet parts

Loudness Meter — measure peak, RMS, and LUFS

Mono Converter — collapse stereo to mono

Channel Extractor — pull L, R, Mid, or Side

Sample Rate Converter — resample to 44.1, 48, or 96 kHz

Polarity Inverter — flip waveform for phase alignment

DC Offset Remover — center waveform around zero

Audio Visualizer — render an animated video from audio

StudioWavePro supports MP3, WAV, OGG, M4A, and FLAC files. Exports include WAV and MP3. This app requires JavaScript to run. Please enable JavaScript in your browser.