#111 · Browser Audio Tool

Silence Activated Recorder

Record from your microphone and automatically keep speech while sustained silence ends the capture. Everything stays in your browser.

Microphone input

Local browser processing
Microphone captureRecord a sample directly in this browser
No recording captured
Choose an audio file to begin.
Audio is processed locally in your browser and is not uploaded.
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How to use Silence Activated Recorder

  1. Allow microphone access and capture a quiet sample.
  2. Adjust the settings for your task.
  3. Run the tool, review the measured result, and download the output.

What this audio tool does

Record from your microphone and automatically keep speech while sustained silence ends the capture. Everything stays in your browser.

The browser calculates directly from decoded PCM samples and creates a fresh result file.

Browser decoding support varies by operating system. WAV is the most predictable input and output format.

Supported formats and limits

Common browser-decodable audio is accepted. Results are exported as PCM WAV or structured JSON, depending on the task.

InputWAV, MP3, M4A, OGG, WebM when supported
PrivacyLocal processing; no upload

Example and practical tips

Record from your microphone and automatically keep speech while sustained silence ends the capture. Everything stays in your browser.

  • Preview the result before downloading.
  • Keep the original file until you have checked the output.

Frequently asked questions

Does silence activated recorder upload my audio?

No. Processing runs locally in the current browser tab.

Which input formats can I use?

Any format your browser can decode, commonly WAV, MP3, M4A, OGG, and WebM.

Why might an audio file fail to open?

Codec support differs between browsers even when the filename extension looks familiar.

Can I preview the result before downloading?

Yes. Audio outputs appear in the result player before download.

Will the original file be changed?

No. The original remains untouched; the tool creates a separate result.

Processing details

EngineWeb Audio API
ExportNew browser-generated file

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