Audio Cutter (MP3 Cutter)

Cut the part of a song, podcast or voice memo you need, or remove a part you do not want, and save it as MP3, WAV or M4A. A waveform picture marks your start and end so you can check them before downloading. The audio is cut inside your browser; nothing is uploaded.

How to use this tool

1. Choose the audio file (a video works too).
2. Type the start and end, as 1:05 or 65 seconds. Leave the end empty to go to the end of the file.
3. Choose "Keep it" to save just that part, or "Remove it" to delete it and join the rest.
4. Add a fade in or out if you like, pick the format and press Calculate.

Formula

Clip length = end − start (keep) · Result length = total − (end − start) (remove)

Times are turned into sample positions (time × sample rate), so cuts are exact to one sample in WAV, MP3 and M4A output. Fades are linear volume ramps. When a part is removed, the two sides meet with 5 ms fades so the join does not click. "Same format" copies the compressed data without decoding it, so quality is untouched but MP3 and AAC cuts land on the nearest frame (about 26 ms) and no fades are possible (FLAC is re-encoded losslessly instead, so its cuts are exact); that mode uses the ffmpeg engine, a one-time download of about 30 MB.

Example

From a 3:30 song, start 0:45 and end 1:15 with "Keep it" gives a 30-second clip. With "Remove it" instead, the result is 3:30 − 0:30 = 3:00 long.