Overview
Noise Decibel Meter is a free online sound level meter that measures real-time noise levels directly in your browser. Using your device's microphone and the Web Audio API, it delivers instant decibel (dB) readings without any app download, account, or cost. All audio is processed locally on your device, so no sound data is ever recorded, stored, or sent to a server—keeping your measurements fully private.
Key Features
- Real-time dB readings — live sound level measurement the moment you hit start
- dBA & dBC weighting — switch between A-weighting (human hearing) and C-weighting (low-frequency sounds like bass and machinery)
- 60-second history graph — visualize noise spikes and trends over time
- Min / Avg / Max stats — automatic session summaries
- CSV export — save a timestamped log of your readings
- Privacy-first — all processing happens locally; nothing leaves your device
- Cross-device — works on any modern browser (Chrome, Safari, Firefox, Edge) across desktop, tablet, and mobile
- Decibel reference chart — built-in guide to common sound levels
- Multilingual — available in English, Spanish, French, Japanese, Portuguese, and Chinese
Use Cases
- Home — check noise from appliances, HVAC, or noisy neighbors
- Office & workplace — monitor ambient noise and identify disruptive levels
- Outdoors — measure traffic, construction, or venue noise
- Hearing protection — track exposure and stay aware of damage-risk levels (85+ dB)
- Sleep & wellbeing — assess night-time noise against WHO recommendations
- Content creators & musicians — quick environment checks before recording
Note: for legally compliant occupational assessments (OSHA, ISO 61672), pair the tool with a certified hardware meter—browser readings are accurate within ±2–3 dB, ideal for everyday awareness and trend monitoring.
Getting Started
- Open noisedecibelmeter.com in any modern browser
- Click Start Measuring
- Grant microphone access when prompted
- Watch live dB readings appear instantly
- Switch between dBA/dBC, review your history graph and stats, and export a CSV log if needed
- Hit Stop when finished
No installation, no sign-up, no setup.
Pricing
100% free, forever. No subscription, no account, no hidden costs, no ads required to unlock features. Every feature—real-time measurement, weighting modes, history graph, and CSV export—is fully available at no charge.
