Live Decibel Meter & Sound Level Analyzer — Free Online Tool

Measure loudness live — dBA / dBC / dBFS, Leq/Max/Min, large HUD + dial gauge, 50 Hz hum check, NIOSH safety timer, rolling graph with CSV/JSON/PNG export & calibration offset, 100% offline.

Live Decibel Meter & Sound Level Analyzer is part of Diagnostics & Testing on Rajlabs. It runs entirely in your browser — your files and text are never uploaded to a server. The same tool is available on all three primary hosts: utility.rajlabs.in, tools.rajlabs.in and utils.rajlabs.in. Bookmark https://utility.rajlabs.in/decibel-meter or install it as a standalone app from your browser.

What you can do

Measure loudness live — dBA / dBC / dBFS, Leq/Max/Min, large HUD + dial gauge, 50 Hz hum check, NIOSH safety timer, rolling graph with CSV/JSON/PNG export & calibration offset, 100% offline. With Live Decibel Meter & Sound Level Analyzer you get live results as you type, one-tap presets for common cases, copy buttons, download/export (PDF, PNG, CSV, JSON where applicable) and a shareable URL that remembers your inputs. Dark mode and mobile responsiveness are built in — it looks great on phone, tablet and desktop.

How to use

1. Open Live Decibel Meter & Sound Level Analyzer at https://utility.rajlabs.in/decibel-meter.
2. Enter or upload your data — the tool validates and previews instantly in the browser.
3. Adjust presets, then copy, download or share the result. Add ?param=value to the URL to prefill for sharing.

Why this tool is different

• Private & offline: 100% client-side — no data leaves your device. Works on slow networks after first load.
• Accurate & fast: exact constants, Indian formats (crore/lakh, IFSC, bigha) and exam presets where relevant.
• Installable: install Live Decibel Meter & Sound Level Analyzer as its own app icon (PWA) — it opens directly to this tool.
• Free & no watermark: unlimited use, no signup, no ads covering content.

Tips

Use the category navigation to discover related tools — for example, after using Live Decibel Meter & Sound Level Analyzer try other Diagnostics & Testing tools from the homepage. If you need a different format, the URL Lab, Code Formatter or Converters can chain your output. Found a bug or want a preset? Open an issue on GitHub — Rajlabs ships updates weekly.

FAQ

Is Live Decibel Meter & Sound Level Analyzer free? Yes, completely free with no limits.

Do you store my data? No — everything runs locally in your browser.

Can I use it on mobile? Yes — the layout adapts to phones and can be installed as an app.

Browse all 126+ tools · Open Live Decibel Meter & Sound Level Analyzer

Static fallback for crawlers without JavaScript — enable JavaScript for the full interactive Live Decibel Meter & Sound Level Analyzer experience.