How do I cut an MP3 file?

Trimming cuts an MP3 down to a chosen time range — everything before the start point and after the end point is removed. Typical jobs: slicing one song out of a long recording, cutting dead air from the front of a podcast take, isolating a quote from an interview, or preparing a 30-second clip for a ringtone or social post.

Precision matters at the edges. An MP3 is made of frames of about 26 ms each, so cut points are effectively frame-aligned; for speech and most music this is imperceptible. Cutting mid-note or mid-word will always sound abrupt regardless of precision, so aim your cut points at silences or natural pauses, and use a fade-in/fade-out if the material has no clean gap.

Trimming is also the honest way to shrink a file when compression isn't appropriate: removing 20 minutes of pre-show silence reduces size proportionally with zero quality cost to what remains. For ringtone work, trim to under 30 seconds and then convert with MP3 to M4R.

Reasons to convert MP3 to MP3 usually come down to compatibility, file-size, or specific feature requirements. Common situations:

• An app or platform only accepts MP3 uploads.
• You need a feature unique to MP3 (e.g. lossless editing, chapter markers, smaller streaming size, etc.) that MP3 doesn't provide.
• You're optimising file size — modern formats often produce smaller files than the older format you started with.
• You need a single archival format across a project so files behave consistently in the same viewer.

1. Open the MP3 → MP3 tool on mp3.now.
2. Drag your MP3 file onto the drop zone, or click Select files. You can drop a whole folder of files at once.
3. The output is fixed to MP3. If the format supports extra options (bitrate, sample rate, channels, volume normalization), tweak them in the options panel.
4. Click Convert. The job runs on our server and finishes in a few seconds for typical tracks.
5. Download the result. Files stay in storage for 24 hours and are then permanently deleted.

The entire flow is free for the first 10 jobs per day with no signup required. A free account doubles that quota; a premium plan removes the limit entirely.

• Place cuts in silences or pauses — a cut mid-word or mid-beat is always audible.
• Making an iPhone ringtone? Trim to under 30 seconds, then convert to M4R.
• Trim before compressing: removing unwanted minutes saves more space than any bitrate drop.
• Note your start/end times from a player first (e.g. 12:34–15:02) for accurate one-pass trimming.
• Keep the untrimmed original until you've confirmed the cut points are right.