Live JavaScript heap monitor — see how your browser manages memory right now.
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JS Heap Used (MB)
Browser Comparison
* Only Chromium browsers expose performance.memory. Other values are estimated ratios from published benchmarks.
Heap Statistics
Metric
Value
JS Heap Used
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JS Heap Total
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JS Heap Limit
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API Available
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Memory Stress Test
Allocated: 0 MB
JS heap ≠ RAM. Activity Monitor / Task Manager shows 3–5× this number because it includes the rendering engine, GPU buffers, DOM nodes, and per-process overhead that JavaScript cannot see.