RAM Test Online
Test RAM speed in your browser: a 64 MB allocation benchmark measures write and read throughput, with approximate device memory and JS heap.
How to use this test
Press the memory test button and wait while the tool allocates 64 MB, writes and reads it, then frees it immediately. No files are touched and nothing is uploaded.
How the measurement works
The test allocates 64 MB in typed arrays, measures write and read throughput in MB/s, and reports approximate device memory and JavaScript heap use where the browser exposes them.
How to interpret results
Use the speeds to compare browsers and devices. A slow result on a nearly-full system usually means the operating system is paging to disk, not that one RAM stick is faulty.
Troubleshooting tips
Close memory-heavy apps and browser tabs, then repeat. If the whole computer is slow and the test is slow too, check total memory use in your system monitor before suspecting hardware.
Related tests
You can also browse every utility from the complete tool index.
Common ram questions
How do I test my RAM online?
Open the RAM test and run the 64 MB browser memory benchmark. It measures write and read speed and shows approximate device memory and JavaScript heap use, all locally with nothing uploaded.
Read full answer →Is 8 GB RAM enough in 2026?
For light browsing and office work, 8 GB is usually workable. For heavy multitasking, many browser tabs, large spreadsheets or creative apps, 16 GB is noticeably smoother. If your system constantly uses nearly all memory, an upgrade helps more than any browser setting.
Read full answer →Why does my computer use so much RAM when idle?
Modern systems cache files and keep background apps, browser tabs and services in memory on purpose — unused RAM is wasted RAM. Worry only when the system is slow, swapping heavily to disk, or running out of free memory during normal work.
Read full answer →How much RAM do I need?
It depends on use: light browsing works with 8 GB, while heavy multitasking, large spreadsheets and creative apps are smoother with 16 GB or more. The test shows approximate device memory where the browser exposes it.
Read full answer →