Trim Audio Cutter

Cut, trim, and convert audio files directly in your browser. This tool works completely offline and supports formats your browser can decode (typically WAV, MP3, M4A, OGG, FLAC). Processing happens locally on your device.

Drop audio files here or click to browse Supports common audio formats

Waveform Zoom & Selection

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Frequently Asked Questions

What audio formats are supported?

Your browser determines which formats can be decoded. Most modern browsers support WAV, MP3, M4A/AAC, OGG, and FLAC. WAV export is always available.

Does this work offline?

Yes! All processing happens locally in your browser. No audio data is sent to any server.

When should I use WAV vs WebM Opus?

Use WAV for maximum quality and editing purposes. Use WebM Opus for web delivery as it provides excellent compression with minimal quality loss.

How It Works

Audio is decoded using the Web Audio API (browser-dependent support)
Processing happens in memory using OfflineAudioContext for sample-accurate timing
WAV files are created by manually writing RIFF headers and PCM data
WebM Opus uses MediaRecorder API if supported by your browser

For informational and educational purposes only. Processing occurs locally in your browser and depends on your device codecs. Audio quality and compatibility may vary. For professional work verify loudness levels, formats, and legal rights before publishing.

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Trim Audio Cutter

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