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.

Audio Trimmer (Server-Side)

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.

Server-side tool: Your audio file will be uploaded to our server for trimming via ffmpeg. It is processed in memory and deleted immediately — we do not store your files.

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.

This tool uploads your file to our server for trimming. The file is deleted immediately after processing.