Cut Audio Online Free — Trim MP3 & WAV in Browser

Trim, cut, and split audio files free in your browser. Precise selection, fade handles, and instant preview — your files never leave your device.

Trim in 4 Steps

1. Load your file. Drop an MP3 or WAV into the trimmer. The waveform renders instantly and nothing leaves your device.
2. Select what to keep. Drag across the waveform to mark your region. Zoom in for precision. Cutting a podcast breath or a song intro gets much easier when you can see individual beats and pauses.
3. Listen before you commit. Play the selection first. The trimmer loops exactly what you highlighted, so there are no surprises. Nudge the edges until the cut feels rhythmically right.
4. Fade and export. Add a short fade-in or fade-out. Even 10 to 20 milliseconds kills the click that raw cuts produce. Then download: WAV if you'll keep editing, MP3 if it's a finished file.

Need to cut something out of the middle, an um, a cough, a long pause? Select the unwanted region, delete it, and the two remaining pieces butt together. They'll join seamlessly as long as you cut at quiet moments.

Cuts Nobody Can Hear

A bad cut announces itself with a click or pop. That sound is the waveform jumping discontinuously from one value to another, and dodging it is the entire craft of trimming:

• Cut at zero crossings. Zoom in and place the cut where the waveform crosses the center line. The signal is momentarily silent there, so the join is inaudible.
• Use micro-fades. No zero crossing handy? A 5 to 15 ms fade at the edit point smooths the transition. Too short to hear as a fade. Just long enough to erase the click.
• Cut on the beat. For music, put edits on downbeats or bar lines. The ear expects change there, so rhythmic edits feel intentional instead of glitchy.
• Leave handles. If you'll edit again later, keep an extra half-second on each side. You can always cut tighter later. You can't un-throw-away audio.
• Match the room tone. Cutting a pause out of a voice recording can make the background hiss jump. A tiny crossfade between the pieces blends the noise floor back together.

Splitting, Joining, and the Rest

Trimming is just the start. Once you can cut precisely, a few combinations cover nearly all everyday editing:

• Split a long recording into chapters or tracks by cutting at each boundary and exporting the pieces. Perfect for lectures, DJ mixes, and audiobooks.
• Join clips together with the Audio Joiner, which can crossfade between pieces so a compilation flows like one continuous recording.
• Remove silence automatically instead of hunting pauses by hand. The Silence Remover finds quiet regions and cuts them in one pass, with adjustable thresholds so it doesn't eat soft speech.
• Make a ringtone by trimming a 30-second chorus and exporting it. The Ringtone Maker wraps this whole workflow, with the 40-second iPhone limit marked right on the waveform.

The Honest Limits

• MP3 is lossy, and every re-encode costs you. Each MP3 export re-compresses the audio. One trim-and-export is inaudible in practice. Trim and re-save the same MP3 five times and artifacts stack up. For multi-stage editing, work in WAV and export MP3 once at the very end.
• Very long files need patience. Browser memory is finite. Hour-long recordings work fine, but multi-hour files can get sluggish. Split those into chunks first.
• Trimming can't fix a bad recording. It removes unwanted sections. It doesn't remove the background noise, echo, or distortion inside the sections you keep. For cleanup, see the Noise Reducer and the Reverb Remover.

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Frequently asked questions