Audio Cutter

How to use the Audio Cutter

1. Choose or drag in an audio file. It opens right here and shows its waveform.
2. Drag the two blue handles to mark the part you want, or type exact start and end times (for example 0:12.50).
3. Pick Keep selection to save only that part, or Remove selection to cut it out and join what is left.
4. Press ▶ Play selection to check it, and add a fade in or fade out if you want a softer start or ending.
5. Click Cut and create WAV, listen to the result, then download it.

How it works

When you open a file, your browser's built-in audio decoder turns it into raw samples, the same numbers your speakers eventually play. The cutter works directly on those samples: start and end times are converted to exact sample positions (time × sample rate), so a cut at 12.50 seconds in a 44,100 Hz file lands on sample 551,250. Keeping a selection copies the samples in between; removing one copies everything before and after it and joins the two parts.

A hard join between two unrelated points in a waveform can produce a tiny click. In remove mode the tool can overlap the two sides for 10 milliseconds and blend them, which hides the click while shortening the file by that same 10 ms. Fades are straight-line volume ramps applied to the beginning and end of the result, from silence to full volume and back.

The result is saved as an uncompressed 16-bit PCM WAV file at the original sample rate when your browser can detect it (most WAV, MP3, OGG and FLAC files). WAV opens almost everywhere, but it is larger than MP3: about 10 MB per minute of stereo audio at 44.1 kHz. If you need a smaller file, convert the WAV with a desktop audio app you trust.

Example: a 3-minute song with the selection set from 0:30.00 to 1:00.00 and a 2-second fade out gives a 30-second WAV that ends smoothly, about 5 MB in size.

Frequently asked questions

Which audio formats can I open?
Anything your browser can decode. That is usually MP3, WAV, AAC/M4A, OGG (Vorbis or Opus) and FLAC in current Chrome, Edge and Firefox; Safari handles MP3, WAV, AAC/M4A and FLAC, and newer versions also read OGG. Apple-protected or DRM files cannot be opened.

How big a file can it handle?
Decoded audio takes about 10 MB of memory per minute of stereo sound, so songs, podcasts and voice notes are fine. On a computer, files up to roughly 30 minutes work well; on phones, which have less memory, stay under about 10 minutes.

Why is the saved file a WAV and not an MP3?
WAV is lossless and every device can play it, so your cut never loses quality. Making MP3s in the browser would require an MP3 encoder library, and the ones available have licenses we do not use on this site.

Can I cut out a part from the middle?
Yes. Switch to Remove selection, mark the part you do not want, and the tool joins the audio before and after it.

Is my audio uploaded?
No. The file is read, edited and saved by your own browser, so nothing is sent to a server.