Trim a section out of an audio file — fast, in your browser.
Drop your file here
or click to browse
Max 100MB
Upload an MP3, M4A, AAC, WAV, OGG, or FLAC file, drag the in / out handles on the waveform to where you want the clip, and download the trimmed result. The whole pipeline runs locally in your browser — your audio never touches a server.
By default the tool uses FFmpeg's stream-copy mode, which performs a container-level cut without re-encoding. That means trimming a 10-minute MP3 takes a fraction of a second, the file size is exactly proportional to the new length, and the audio quality is identical to the source. Stream-copy cuts at the nearest keyframe, so the start of the clip can shift by a fraction of a second — fine for almost every use case (ringtones, podcast highlights, voice-memo cleanup).
Need a sample-accurate cut? Toggle "Exact frame trim" and the tool re-encodes around the in/out points. Slightly slower and more memory-intensive — fine on desktop, not recommended for large files on mobile devices.
FFmpeg-WASM is a sizeable download (~25 MB) so the tool only loads it when you press Trim — not on page open. Waveform rendering uses a decimated peak-list, not the full PCM buffer, so memory usage stays bounded regardless of file length. There's a 100 MB upload cap and a soft warning on mobile for large files. Nothing is uploaded; everything runs locally and the temporary buffers are cleaned up immediately after export.
Drag and drop or click to select your file.
Adjust quality, size, or format options.
Your processed file is ready instantly.