How to Cut or Trim an Audio File Online with mp3cut.net

Updated

mp3cut.net is a browser-based audio cutter: you upload a file, drag the start and end sliders around the fragment you want, and click "Cut" to download the result. It needs no installed software, accepts files from your computer, Google Drive, Dropbox, or a URL, and supports over 300 formats according to the site. The steps below cover the full workflow, including the optional pitch, volume, and speed adjustments you can apply in the same pass.

Step 1: Get your audio into the editor

Open mp3cut.net and load the track using any of these routes:

  • Drag and drop the file onto the page.
  • Choose File to upload from your hard drive.
  • Google Drive or Dropbox to pull a file from cloud storage.
  • From URL to fetch a file hosted online.

The site states that all common formats are supported, with more than 300 formats accepted in total. If you also want the audio from a video, the same tool can extract the audio track from a video file, which is useful for pulling a soundtrack out of a movie or music video.

Step 2: Set the start and end points

Once the waveform loads, define the fragment you want to keep:

  • Drag the interval controls (sliders) to move the start and end markers.
  • Or use the arrow keys on your keyboard for finer adjustment.

The selection you see between the markers is exactly what the cut will keep, so check both edges before moving on.

Step 3: Apply optional edits in the same pass

You don't have to cut and then re-edit. The editor lets you combine features at once:

Adjustment What it does
Shift pitch Raises or lowers the pitch of the selection
Change volume Makes the fragment louder or quieter
Change speed Slows down or speeds up the audio
Fade in / fade out Smooths the start and end of the track

Fade in and fade out are worth using when the cut lands mid-phrase — for example, when turning a section of a song into a phone ringtone, a hard start or stop sounds abrupt.

Step 4: Cut and download

Click Cut to process the selection, then save the output to your hard drive. Before downloading, pick the output format that matches where the file is going.

One format-specific shortcut: the site can create an iPhone ringtone in one click, saving the file as m4r and trimming it to 40 seconds so it can be transferred to the phone via iTunes.

Common snags

  • Cut lands in the wrong place. Zoom in on the waveform and nudge the markers with the arrow keys rather than dragging, which gives you single-step precision.
  • Output sounds clipped at the edges. Add a short fade in and fade out instead of cutting on a hard boundary.
  • Wrong format for your device. Check the output format before downloading; for iPhone ringtones, use the dedicated m4r option rather than converting afterward.
  • Source is a video, not audio. Use the extract-audio-from-video path instead of trying to upload the video as a music file.

The site lists a pricing page, so some features or usage tiers may be tied to a paid plan — check that page if you hit a limit rather than assuming everything is free.