Free browser sound level meter

Use this free sound decibel meter online as a sound level meter, online decibel meter, dB meter, and noise level meter for quick ambient sound checks in your browser, no app required.

• Free sound decibel meter for online noise checks
• Sound decibel meter online for browser-based noise checks
• Sound decibel meter app alternative with no installation
• Sound test decibel meter with live chart and peak readings
• Sound level meter readings with live dB estimates
• Live browser microphone sound level estimates
• Min, average, max, and peak decibel readings
• Online decibel meter and sound level meter workflow
• Noise level meter reference chart with common sound sources
• Color-coded history line for current sound level changes
• Calibration offset for more consistent device readings

Noise Reference Chart

Use these ranges to put your sound level meter reading into context. Actual exposure risk depends on distance, duration, frequency content, and the sensitivity of your ears.

Real-time browser sound analysis

This sound decibel meter samples your microphone, calculates RMS loudness, tracks peaks, and maps the digital audio level to a practical estimated decibel and SPL range.

Hearing safety

• 85 dB can become risky after long exposure.
• 95 dB often calls for hearing protection within an hour.
• 105 dB and above should be brief and protected.
• Pain, ringing, or muffled hearing means leave the sound source.

Decibel Meter FAQ

Is this sound decibel meter online accurate?
This sound decibel meter online gives a useful reference reading for everyday noise checks. Browser and phone microphones are not calibrated SPL instruments, so professional, legal, medical, or workplace compliance measurements still need certified equipment.

Is this sound decibel meter online free?
Yes. This is a free sound decibel meter that runs in your browser. You can start a noise check without creating an account, paying for an app, or installing software.

Can I use this instead of a sound decibel meter app?
Yes, for quick everyday checks. This sound decibel meter app alternative works online in supported browsers, so it is useful when you want a fast reading without downloading a mobile app.

Can this work as a sound test decibel meter?
Yes. You can use it as a sound test decibel meter by starting the tool, keeping your device in a steady position, and watching the live dB reading, chart, min, average, max, and peak values.

Can I use this as a sound level meter or SPL meter?
Yes, you can use it as a browser-based sound level meter for quick checks, but this sound level meter is an estimated SPL meter rather than a certified sound pressure level meter. For compliance work, use calibrated professional equipment.

Why does the site need microphone permission?
The meter needs live microphone input to estimate sound levels. Audio is analyzed locally in your browser and is not recorded, uploaded, or stored.

What is dBA?
dBA is an A-weighted sound reading that roughly follows how human hearing responds to different frequencies.

How should I calibrate it?
Place a calibrated sound level meter next to your device, play a steady tone or noise source, then adjust the calibration offset until both sound level meter readings are close for that setup.

Can I use this sound meter online on a phone?
Yes. Most modern mobile browsers support microphone access for online sound meters. If the meter does not start, check that your browser has microphone permission in both the browser prompt and your device settings.

Does the dB meter record or upload audio?
No. The sound level is calculated locally in your browser from microphone input. The site does not save audio files, stream your microphone, or upload recordings to a server.

How do I measure sound decibels with this sound decibel meter online?
Press Start, allow microphone access, keep your device in a consistent position, and read the live dB value. This sound decibel meter online also works as a sound level meter with charts and min, average, max, and peak cards to measure noise level changes over time.

What decibel level is dangerous?
Risk depends on volume and exposure time, but 85 dB can become harmful after long exposure, 95 dB often calls for hearing protection, and 105 dB or higher should be brief and protected.

Why do different devices show different dB readings?
Microphones, browser audio processing, cases, microphone placement, and automatic gain control can all change readings. Use calibration when you need more consistent results on the same device.