Audio & Acoustic Testing Tools

Q: Will the browser ask for microphone permission?

Only for tools that need mic input. Playback-only tools like the frequency sweep do not request any permissions.

Q: Is my audio ever recorded or uploaded?

No. CapyToolkit doesn't record, store, or upload audio input. Everything is processed in real time inside your browser and discarded when you are done.

Q: What equipment do I need?

It depends on the tool. Speaker tests just need working audio output. Microphone tests need a connected mic. Each tool tells you what it requires before you start.

Q: Which browsers support the Web Audio API?

Chrome, Firefox, Edge, and Safari 14.1 or newer. The tools will warn you if your browser is missing a required API.

Q: Can I use these tools offline?

Yes. Once the page has loaded, no internet connection is needed.

Q: Do these tools work on mobile?

Yes, though audio testing is more consistent on a desktop with a dedicated audio interface. Mobile results vary depending on hardware and the browser audio pipeline. CapyToolkit supports mobile browsers for all tools that the Web Audio API allows on those platforms.

Measure, sweep, and stress-test your audio hardware securely. Leverage the Web Audio API for precise, local microphone and speaker diagnostics in the browser.

ZERO UPLOAD · ALL LOCAL

Audio & Acoustic Testing Tools Measure, sweep, and stress-test your audio hardware securely. Leverage the Web Audio API for precise, local microphone and speaker diagnostics in the browser.

Live Tools Last Update

Decibel & SPL Cross-Domain Calculator Convert between dB, watts, volts, and sound pressure level, with the underlying formula shown.

2026-05-08

Speaker Frequency Sweep & Resonance Tester Sweep 20 Hz – 20 kHz to find resonances, rattle points, and drop-off frequencies — 100% local.

2026-04-24

Microphone Quality, Noise & Latency Tester Noise floor, clipping, frequency response, echo loopback, and round-trip latency — 100% local.

2026-04-22

About This Category

Why test audio hardware in the browser?

Professional audio measurement software typically requires native installation and device drivers. The Web Audio API brings a meaningful subset of that capability to any modern browser, with no install required. Frequency sweeps, SPL calculations, and round-trip latency tests can all be performed using the audio hardware your operating system already recognises.

The tools in this category use the Web Audio API to generate test signals (sine sweeps, impulse tones) and analyse microphone input. All DSP runs in a browser AudioWorklet or ScriptProcessorNode, so your raw audio never leaves the device. This matters when you are testing in a sensitive environment or simply do not want recordings of your space uploaded to a remote server.

Browser-based audio tools also work across platforms without compatibility concerns: the same frequency sweep tool works on Windows, macOS, Linux, and ChromeOS using the browser's audio pipeline.

FAQ

Will the browser ask for microphone permission?

Is my audio ever recorded or uploaded?

What equipment do I need?

Which browsers support the Web Audio API?

Can I use these tools offline?

Do these tools work on mobile?

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