Does it upload audio?

No. Web Audio decodes the file inside the browser tab.

/media local tool

Waveform Poster

Sample audio peaks and export a 16:9 waveform cover.

Local execution receiptinput path disclosedTool content stays out of MonoTools URLs and API requests.

Working input: Browser memory
Cross-tool handoff: Session only · 10 min
URL payload: Never
Export: Explicit action

Verify it: open DevTools Network, clear the log, use the tool, then inspect fetch/XHR requests. Page assets and optional aggregate analytics may use the network; tool input is not included.

Full privacy model

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How to use

01Enter a poster title.
02Choose a local audio file.
03Download the generated waveform cover PNG.

FAQ

Does it upload audio?: No. Web Audio decodes the file inside the browser tab.

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