How to trim an audio file
Sound Trimmer keeps the section between your start and end time. You can use it to shorten a voice recording, cut a music clip you have permission to use, or prepare a short intro or outro.
1. Open your audio
Choose an MP3 or WAV file, or drag it onto the file area. The current limit is 60 MB and five minutes. Mono and stereo recordings are supported. A four-second demo lets you try the editor before opening your own file.
2. Set the start and end
Use the sliders for broad adjustments and the number fields for precise times. Both fields use seconds: one minute and fifteen seconds is 75. The highlighted area of the waveform is the section you will keep. The end time must be after the start time and within the recording.
3. Add a fade if needed
A fade in begins quietly and reaches the original volume over the time you enter. A fade out lowers the volume at the end. Each fade must fit within your selected clip. Set a fade to zero to turn it off. If fades overlap, both volume changes apply in the overlapping area.
4. Preview and download
Preview plays your selection with the fades applied. Choose MP3 or WAV, then prepare the download. The download link appears directly below the controls and receives keyboard focus when the file is ready. Changing the selection clears the old download so you do not accidentally save an outdated clip.
If something does not work
A damaged file, unusual codec or unsupported browser can prevent decoding. Try a standard MP3 or PCM WAV, refresh the page or use a recent Chrome, Edge, Firefox or Safari browser. If your phone is low on memory, close other tabs and try a shorter file. Preparing an MP3 can take longer than WAV; the progress bar and cancel button remain available.