Trim & Cut MP3 Online

Cut your MP3 to the exact section you need. Set a start and end time - free and fast.

MP3
MP3
MP3
MP3
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Drag & drop or click to select your MP3 file.

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Adjust bitrate, sample rate, or other output settings if needed.

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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.

Converting MP3 to MP3 is a common requirement wherever different players, apps, and devices need to exchange audio. Whether you are preparing tracks for a music player, a podcast host, a video project, or meeting an upload requirement, having the file in the right audio format is the starting point for every workflow.

MP3 files are tied to specific software, codecs, and hardware. When that audio needs to move into a context that requires MP3 - A different player, a DAW, a streaming platform, or a phone that only accepts certain formats - A fast, reliable converter removes the barrier without installing software or knowing anything about bitrates and codecs.

mp3.now processes your file securely in the cloud and returns a clean MP3 output at the bitrate and quality you choose. Files are processed privately and automatically deleted after 24 hours - Nothing is stored beyond what is needed to complete your conversion.

  • 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.
MP3

MP3 – MPEG-1 Audio Layer III

MP3 is the world's most compatible audio format - Playable on virtually every phone, car stereo, and media player. It uses lossy compression to keep file sizes small at a chosen bitrate.
MP3 Converter
MP3

MP3 – MPEG-1 Audio Layer III

MP3 is the world's most compatible audio format - Playable on every phone, car stereo, browser, and media player. Lossy compression at your chosen bitrate keeps file sizes small.
MP3 Converter

Upload your MP3, enter the start and end time of the section you want, and click Trim. The cut MP3 downloads instantly. Read more: How to Trim an MP3 Online

Yes - trim to 30 seconds or less, then use MP3 to M4R for an iPhone ringtone. Read more: How to Make an iPhone Ringtone: M4R Guide

Yes, completely free with no signup for guests. Read more: Is mp3.now Free to Use? No Signup Required
Devices & Compatibility
Custom iPhone Ringtones: MP3 to M4R Step by Step
iPhones only accept ringtones as M4R files under 30 seconds. Trimming the exact clip, converting it, and getting it onto the phone without iTunes gymnastics.
By MP3.now Editorial · July 22, 2026
Devices & Compatibility
iPhone Voice Memos to MP3: Sharing Recordings Anywhere
Voice Memos saves M4A files that choke car stereos, Windows tools, and half the web's upload forms. The convert-trim-share workflow, and where iOS actually hides the files.
By MP3.now Editorial · July 18, 2026
Voice & Interviews
Reviewing Interviews Faster: Speed-Shifted Playback That Stays Intelligible
Researchers and editors listen to hours of tape per usable quote. How far you can push playback speed by content type before comprehension drops, and how to prep files for it.
By MP3.now Editorial · July 03, 2026
Voice & Interviews
The Journalist's Field Recording Workflow: Recorder to Newsroom
Field recorders write huge WAVs; editors want small files five minutes ago. The convert-trim-send pipeline for filing audio from a phone tether at deadline.
By MP3.now Editorial · June 29, 2026
Video to Audio
Turning Wedding Video into Audio Keepsakes: Vows, Toasts, and Speeches
The videographer delivered four hours of MP4; the part people replay is ninety seconds of vows. Extracting, trimming, and sharing the audio moments worth keeping.
By MP3.now Editorial · June 27, 2026
Video to Audio
From iPhone Video to Audio: Pulling MP3 from MOV Files
Concert clips, kids' recitals, and interview snippets shot on iPhone hold audio worth keeping on its own. The MOV-to-MP3 workflow, plus trimming down to just the moment.
By MP3.now Editorial · June 23, 2026

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