Apps like Sound Meter exist for a simple reason: sometimes you just want to know how loud something actually is. A neighbor’s party, a kid’s new toy, the fan that will not stop rattling, a venue before you buy tickets. Installing an app for a two-minute check feels like overkill, so we built a decibel meter that runs right here in your browser. Grant microphone access and you get a live reading in seconds, no download and no account.
Try the decibel meter now
Tap the button below to allow microphone access, then watch the number move.
How to use it
Grant microphone access when your browser asks, and the meter starts reading immediately. There is no extra start step. The large number is the current decibel level, the colored bar and scrolling graph show how it moves over time, and the reference list underneath translates the number into plain language, so 65 dB reads as “about a normal conversation” instead of an abstract figure. The tool also tracks your session’s peak and average, and keeps a short history of past peak readings on your device so you can compare later. Everything is processed entirely on your device. Nothing is recorded, saved, or sent anywhere, which matters for a tool that listens through your microphone.
How it compares to Sound Meter
Our browser version keeps the part people actually want most of the time: a fast, honest reading of how loud the room is right now. It converts live microphone input into an approximate decibel level, shows you how that reading moves second to second, and gives you plain-language context for what the number means. That covers the “how loud is this, roughly” use case in a few seconds with nothing to install.
We left out the features that make a dedicated app worth keeping installed. Sound Meter and similar apps support microphone calibration against a reference source, continuous background logging over hours or days, threshold alerts and notifications when noise crosses a limit, and exporting readings for a report or a noise complaint. None of that fits a page you visit once and close. Both the app and our tool also share the same honest limitation: phone and laptop microphones are not calibrated instruments, so any reading from either is an estimate, useful for judging relative loudness rather than for formal measurement.
If you need a single check right now, use the tool above. If you need to track noise over time, calibrate against a known level, or get alerted when things get too loud, install the full app.
Get the full app
Sound Meter is a lightweight Android app built specifically for ongoing noise monitoring, with calibration options and history tracking that a browser tab cannot offer. It is a reasonable install if you check noise levels often, whether that is for hearing safety, a home studio, or keeping tabs on a noisy appliance.
Frequently asked questions
Is this accurate enough to measure real noise levels?
It is a good estimate, not a calibrated instrument. Phone and laptop microphones vary in sensitivity, so the exact number can be a few decibels off from a professional sound level meter. It is reliable for judging relative loudness, like noticing a room got noisier, but not for regulatory measurements or formal noise complaints.
Does it record or save any audio?
No. The microphone feed is analyzed in your browser in real time and immediately discarded. Only the numeric peak and average readings are saved to your device’s local storage, and even those never leave your browser.
Is it free?
Yes, completely. There is no signup, no ads, and no in-app purchases. It is a small tool meant for a quick check, not a product with a paywall.
Does it work offline?
Once the page has loaded, the meter needs no internet connection to run, since all the processing happens locally. You do need an initial connection to load the page itself.
Is this the same as the Sound Meter app?
No. Loudscope is our own tool inspired by the same idea, a live decibel readout, built to run instantly in a browser tab. It is not affiliated with or endorsed by the makers of Sound Meter. For calibration, logging, and alerts, install the official app using the link above.
