Tool Area
Audio Track Ingestion
Trim Marker Boundaries
Start Marker0.0s
End Marker10.0s
About this tool
This audio trimmer uses the browser's native Web Audio API to decode, slice, and re-encode audio files entirely client-side. Your audio never leaves your device — no upload, no cloud processing.
Web Audio API Pipeline
AudioContext.decodeAudioData()— Decodes the file into a raw PCMAudioBufferAudioBufferSourceNode— Streams the selection for preview playback- PCM slice extraction — Copies sample frames between start and end offsets into a new buffer
- WAV encoder — Serializes the trimmed buffer into a standard RIFF/WAV file for download
WAV Encoding Formula
sample = clamp(pcm, -1, 1) × 32767 → Int16
Supported Formats
Input: MP3, WAV, OGG, FLAC, AAC (browser-dependent). Output is always standard 16-bit PCM WAV — universally compatible with all audio software.