Skip to main content
makemysounds
FLAC / M4A TrimmerServer
Trim any audio file to a precise start and end time. Supports formats that browsers can't decode — FLAC, M4A, OGG, Opus, AAC, WMA, and more.

Drop an audio file here

Supports FLAC, M4A, OGG, Opus, AAC, MP3, WAV, and more

or click to browse

Why use the server-side trimmer?

Browsers can decode MP3 and WAV files natively, but formats like FLAC, M4A, OGG Opus, and AAC often fail or behave inconsistently across different browsers. This tool sends your file to our server where ffmpeg handles the trimming — it works with virtually any audio format.

You specify start and end times in seconds (decimals are fine for sub-second precision), and the server extracts exactly that segment without re-encoding — preserving the original format and quality.

Working with MP3 or WAV? The Audio Cutter runs entirely in your browser — no upload needed. It also gives you a visual waveform for selecting the trim range by dragging. Use it when your file is in a browser-friendly format and you want the fastest, most private experience.
⎆Processed on our servers. Files are deleted immediately after processing.
How to use FLAC / M4A Trimmer

  1. Drop any audio file

    Supports formats the browser cannot decode — FLAC, M4A, Opus, WMA, AIFF, and more.

  2. Set start time

    Enter the start position in seconds.

  3. Set end time

    Enter the end position in seconds.

  4. Submit

    The file uploads and ffmpeg cuts the requested range.

  5. Download

    Save the trimmed file in its original format.

Frequently asked questions
Why not use the audio cutter?
The cutter relies on the browser's decodeAudioData, which does not handle FLAC, M4A, or Opus reliably. This tool exists for those formats.
Will the format change?
No. The trim uses stream copy when possible, preserving the original codec and bitrate.
What precision does it support?
Millisecond precision, subject to the closest keyframe for codecs that require re-encoding to cut arbitrarily.