Uwarp

Trim audio locally with FFmpeg. Video uploads export the selected audio segment only. First run downloads FFmpeg (~25 MB) once in this browser.

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Trim MP3 online free

Online trim MP3 or M4A with a free audio cutter. Set start and end, download the clip. Local-first. No signup.

What is an online audio cutter?

An audio cutter (also searched as online trim MP3 or sound cutter online) lets you trim a section from an audio file by choosing start and end times. You can also upload a video and export only the selected audio segment as MP3, WAV, or M4A — all in your browser with FFmpeg WebAssembly.

Audio cutter features

Trim MP3, M4A, and other clips online without uploading to a server.

  • Online trim MP3

    Set start and end times to trim MP3 files in the browser.

  • M4A trimmer

    Trim M4A the same way, then download MP3, WAV, or M4A.

  • Sound cutter from video

    Upload MP4, MOV, or WebM and export a cut audio segment.

  • Local-first

    Cutting runs locally with FFmpeg WebAssembly for privacy.

  • Clip length preview

    See duration and selected clip length before you cut.

How to trim MP3 online

Cut an audio clip in three steps.

  1. Upload audio or video

    Drop MP3, M4A, WAV, or a video file (up to 200 MB).

  2. Set start and end

    Adjust the sliders to select the section you want to keep.

  3. Cut and download

    Click Cut audio, then download the trimmed clip.

Great for

Common cut-audio and trim-audio scenarios.

  • Ringtone clips

    Cut a short segment from a song for alerts or social posts.

  • Podcast edits

    Trim intros, outros, or silence before publishing, then attach episode artwork with MP3 Cover Adder.

  • Voice note cleanup

    Remove unwanted starts and ends from recordings.

  • Video soundtrack snippets

    Extract and cut audio from a video without the picture.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.