Memory Usage Analyzer
Monitor this tab's live JavaScript heap and your device's reported RAM in real time. Useful for spotting memory growth, leaks and how heavy a web app really is.
🔒 Local & live
Reads performance.memory and navigator.deviceMemory directly in your browser. Nothing is uploaded — it's a live local readout.
🧪 Spot leaks
If the line keeps climbing and never drops after garbage collection, you likely have a leak. A healthy app sawtooths up and down.
Frequently Asked Questions
Why does it say heap stats need Chromium?
The precise JS heap API (performance.memory) is only exposed in Chromium-based browsers. Firefox and Safari restrict it for privacy, so only device RAM and core count show there.
Does this show my whole system's RAM?
No — browsers can't read total system memory. It shows your device's reported RAM tier and this tab's JavaScript heap, which is the part a web app actually controls.