Trim Audio

Trim Audio cuts a recording down to what you need. Shorten a song for a ringtone or a video, take the “is this on?” off the start of a voice memo, cut a cough or an advert out of the middle of a podcast, or pull three answers out of an interview and join them into one clip.

Open a file and its waveform is drawn. Drag the handles or type exact times, then choose whether that selection is kept or deleted. Add more parts for several cuts at once; the joins are blended over 10 milliseconds by default so they never click, or crossfaded over up to a second. Fades come in four shapes, and “Snap cuts to zero crossings” nudges each cut to a silent point in the wave.

When you keep one part in the original format with no fade, the sound is copied rather than re-encoded, so nothing is lost. Save as MP3, M4A, OGG, WAV or FLAC, or as an iPhone ringtone (.m4r). Everything happens in your browser: no upload, no account and no watermark.

1. Press “Choose a file” or drop an audio or video file on the box. The waveform fills in as the file is read.
2. Drag the two handles, or type times such as 1:23.50 in the Start and End fields. Choose “Keep the selection” or “Delete the selection”.
3. For more cuts, press “+ Add another part” and set it the same way; tap a part on the waveform or in the list to edit it, or × to remove it.
4. Press “Play” to hear the part you are editing, or “Hear the result” to hear the finished cut, joins and fades included.
5. Optional: add a fade and pick its shape, blend the joins, tick “Snap cuts to zero crossings”, and pick a format under “Save as”, including “iPhone ringtone (M4R)”.
6. Press the button (“Trim to …” or “Cut out and save”), listen to the result on the page, and download it.

• Waveform with draggable handles that work with a mouse, a finger or the keyboard, plus exact Start and End fields.
• Keep the selection, or delete it and join what is left.
• Up to 12 parts at once, joined in time order, with a 10 ms to 1 second blend at each join.
• Fade in and out from half a second to five seconds, shaped S-curve, linear, fast or slow.
• Snap cuts to zero crossings (within 10 ms), so no cut clicks.
• “Hear the result” plays the finished edit before you save it.
• iPhone ringtone export (.m4r, AAC), with a warning past 30 seconds and a 40-second limit.
• One part in the same format with no fade is copied without re-encoding; title, artist and cover art carry over.
• Opens MP3, WAV, M4A, AAC, OGG, Opus, FLAC and WebM, and the sound of MP4, MOV, WebM and MKV videos (to shorten the picture too, use Trim Video).

• Start a cut just before the first sound, then add a 0.5 second fade in.
• For music, end on a 2 or 3 second fade out with the “Fast” shape: it drops away quickly then tails off, which sounds natural.
• When deleting from the middle of music, a 0.2 to 0.5 second blend hides the join; for speech the 10 ms default sounds cleanest.
• A copy without re-encoding can only cut between the small frames the file is made of. Add a fade, snap, or choose WAV when it must be exact to the sample.