Audio Trimmer

What is audio trimming?

Audio trimming is the process of cutting an audio file to keep only a specific portion. Whether you need to extract a favourite passage from a podcast, shorten a voice memo, or isolate a section of a song, trimming lets you define precise start and end points and discard everything outside that range.

How this tool works

When you upload a file, the browser decodes the audio using the Web Audio API and draws the waveform on a canvas element. You can then drag the green (start) and red (end) handles to select the region you want to keep. The preview button plays only the selected portion so you can verify the cut before exporting. When you export, ffmpeg.wasm - a full audio processing library compiled to WebAssembly - trims the file at the exact timestamps and encodes it to your chosen format.

Supported formats

You can upload MP3, WAV, OGG, FLAC and M4A files. Export is available as MP3 (compressed, smaller file size) or WAV (lossless, larger file size). The entire process runs in your browser - no audio data is uploaded to any server.

Privacy

This tool processes audio entirely on your device using WebAssembly. No files are uploaded, no data leaves your browser. Your audio stays private.