Audio Trimmer & Cutter
Converts start and end seconds to sample positions at 48 kHz, keeps the half-open interval [start, end), and exports the retained channels as PCM16 WAV.
About this audio trimmer & cutter
Audio Trimmer & Cutter — browser-based utility.
How this tool works
Converts start and end seconds to sample positions at 48 kHz, keeps the half-open interval [start, end), and exports the retained channels as PCM16 WAV.
- Download the example file and select it in the file input.
- Set the visible controls to: Start (seconds) = 0.25; End (seconds) = 1.25
- Click “Process locally”.
- Download the result and inspect: czoa-audio-trimmer.wav — PCM16; 48000 Hz; 2 channels; 48000 frames
Worked example
Scenario: Example file: /examples/audio-stereo.wav; Download the example file and select it in the file input. Set the visible controls to: Start (seconds) = 0.25; End (seconds) = 1.25 Click “Process locally”. Download the result and inspect: czoa-audio-trimmer.wav — PCM16; 48000 Hz; 2 channels; 48000 frames
Sample input:
Illustrative output:
Limits and verification
Start must be nonnegative and end must be later, within the decoded duration. Sample positions are rounded down. Decoding may resample; PCM16 export quantizes samples and does not preserve source metadata.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- W3C Web Audio API 1.0 — browser decoding and offline rendering
- Microsoft RIFF/WAVE PCM and WAVEFORMATEXTENSIBLE
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Download the example file and select it in the file input.
- Set the visible controls to: Start (seconds) = 0.25; End (seconds) = 1.25
- Click “Process locally”.
- Download the result and inspect: czoa-audio-trimmer.wav — PCM16; 48000 Hz; 2 channels; 48000 frames
Frequently asked questions
How does Audio Trimmer & Cutter process the signal or file?+
Converts start and end seconds to sample positions at 48 kHz, keeps the half-open interval [start, end), and exports the retained channels as PCM16 WAV.
How can I reproduce the Audio Trimmer & Cutter example?+
Example file: /examples/audio-stereo.wav; Download the example file and select it in the file input. Set the visible controls to: Start (seconds) = 0.25; End (seconds) = 1.25 Click “Process locally”. Download the result and inspect: czoa-audio-trimmer.wav — PCM16; 48000 Hz; 2 channels; 48000 frames
What limits apply to Audio Trimmer & Cutter?+
Start must be nonnegative and end must be later, within the decoded duration. Sample positions are rounded down. Decoding may resample; PCM16 export quantizes samples and does not preserve source metadata.
What does browser-isolation evidence establish for Audio Trimmer & Cutter?+
Recorded browser requests contained no selected-audio payload while this fixture decoded, sliced, and downloaded WAV. That establishes only the tested-browser tool-value path; page assets, extensions, permissions, and other network configurations are outside the evidence.