Last updated: 2026-08-15
1. Your audio never reaches us
A page that asks for your microphone owes you this answer before anything else. When you press start, your browser opens your microphone and hands the stream to JavaScript running in your own tab. That is where it stays. The waveform, the spectrum, the dBFS numbers and any clip you record are all produced and held inside your browser. No audio, no derived measurement and no recording is transmitted to us, stored by us, or received by us in any form.
You do not have to take that on trust. This site is a set of static files with no backend that could receive audio if it wanted to. Open your browser’s developer tools, switch to the network tab, run a full test including a recording, and observe that no request is made. Closing or reloading the tab destroys everything the page was holding.
2. Permission, and what happens if you decline
The microphone is opened only after you allow it, through your browser’s own permission prompt, and only when you press the start button. Nothing on this site requests access on page load. If you decline, no further request is made unless you press start again, and every other part of the site — the explanations, the conversion tables and the app-specific instructions — continues to work without a microphone. You can withdraw the permission at any time in your browser’s site controls; the page will simply return to its pre-permission state.
3. The recorder
The record button captures a clip using your browser’s MediaRecorder and builds it in the
page’s memory. It is handed to the audio player as a temporary in-memory reference, is not written to
disk by us, is not uploaded, and is discarded when you record again, leave the page or close the tab.
There is no download button and no share function, because both would create a copy we would then have
to make promises about.
4. Information we collect
The tool requires no account, no sign-up and no personal information, and there is no contact form on this site. We do not ask for your name, email address or any other identifying detail in order to use any page. Where you choose to email the address on the contact page, that mail arrives in an ordinary mailbox in the ordinary way and is not connected to this website.
5. Device names and identifiers
Once you grant access, the page reads the list of audio devices your browser exposes, including their labels and their group identifiers, in order to show you the device picker and to tell you whether a microphone and an output belong to the same physical unit. This information is displayed to you and used for nothing else. It is not transmitted, not logged, and not persisted — the page does not write your device choice to storage, which is why every visit starts from your system default.
6. Cookies and third-party advertising
This site may display third-party advertising, including Google AdSense. Third-party vendors, including Google, use cookies (such as the DoubleClick cookie) to serve ads based on a user’s prior visits to this website or other websites. Google’s use of advertising cookies enables it and its partners to serve ads to users based on their visits to this site and/or other sites on the internet. You may opt out of personalised advertising by visiting Google Ads Settings, or opt out of a third-party vendor’s use of cookies for personalised advertising at aboutads.info. Users in the EEA and UK may also be shown a consent prompt where required by law. These advertising cookies are set by the ad vendor and are entirely separate from the microphone tool — no part of your audio, your recording or your level readings is available to them, because none of it leaves this page.
7. Analytics
We may use privacy-friendly, cookie-free aggregate analytics (for example Cloudflare Web Analytics) to count page views and see which pages are useful. No personally identifying information is collected, and nothing the microphone tool produces — no audio, no level, no device name, no recording — is ever included in analytics data.
8. Local storage and cookies set by the tool
The tool itself sets no cookies and writes nothing to local storage. Your selected device and your processing switches live in the page’s memory for the life of the page. Landing pages preset those switches in their own markup, which is why a page can open with automatic gain already off without remembering anything about you.
9. The embeddable version
If you meet this tool inside an <iframe> on someone else’s website, everything above
still applies: it is the same static, client-side page, it carries no tracking, and microphone
permission is requested by your own browser for that frame. Your audio is no more available to the
host site than it is to us.
10. Affiliate disclosure
Some outbound links on this site may be affiliate links, meaning we could earn a commission if you buy something through them. This never changes the price you pay and it does not influence any reading the tool gives you, any threshold on the meter, or any recommendation on a page.
11. Your choices
You can block or delete cookies in your browser settings and every part of this site will continue to work, because nothing here depends on them. You are equally welcome to use an ad blocker. This service is not directed at children under 13 and we do not knowingly collect information from them.
12. Readings are not certified measurements
The levels, device details and latency figures shown are read from your own hardware through your browser and are as good as what your browser reports. They are a diagnostic aid, not a calibrated instrument, and dBFS is a digital scale that says nothing about sound pressure in your room. What each figure is and is not is set out on the about page.
13. Changes to this policy
If this policy changes, the “last updated” date above changes with it. Material changes are written into this page itself; there is no separate announcement to watch for.
14. Contact
Privacy questions can go to the contact page or rlaejrtn16@gmail.com.