Audio Trimmer Trim and cut audio files to the exact duration you need.

The Audio Trimmer decodes uploaded files using AudioContext.decodeAudioData() to produce PCM AudioBuffers. A waveform is rendered on an HTML5 canvas by downsampling the audio data and drawing amplitude bars. Users set start/end times via interactive handles or numeric inputs. The trimming operation creates a new AudioBuffer from the selected sample range using the formula: startSample = startTime * sampleRate and endSample = endTime * sampleRate. The channel data is sliced from the original buffer and written to a new buffer. The trimmed audio is then encoded as a 16-bit PCM WAV file by constructing the RIFF/WAV header and writing the interleaved sample data. The result is offered as a downloadable Blob.