Cut and trim MP3, WAV, OGG or M4A audio using a visual waveform with live preview and WAV export — nothing is ever uploaded.. Audio Trimmer is a free online tool from the ToolsRift Audio Tools collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Choose an audio file, then drag across the waveform or type exact start and end times. Press Preview to hear only the selected part, then Export WAV to download the trimmed clip.
Entirely inside your browser. The file is read with the FileReader API and decoded with the Web Audio API on your own device — it is never uploaded to ToolsRift or any other server, so even large private recordings stay local.
Any format your browser can decode, which normally covers MP3, WAV, OGG, M4A/AAC, FLAC and WebM. The trimmed result is always exported as an uncompressed 16-bit WAV, because that is the one format guaranteed to be written correctly without a codec library.
You can drag on the waveform for a rough selection and then type exact start and end times in seconds with three decimal places. The cut is made at the nearest audio sample, so it is accurate to a fraction of a millisecond.