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SSD Health Test

Test SSD speed in your browser: a 16 MB IndexedDB benchmark measures storage write and read throughput, with browser storage quota and usage.

Why results may vary

A browser cannot read SSD SMART health data such as health %, wear level or bad sectors. Use CrystalDiskInfo or your SSD vendor's toolbox for that.

How to use this test

Press the storage test button and wait while the tool writes and reads 16 MB through IndexedDB, then deletes the test data. Nothing leaves your device.

How the measurement works

The test measures IndexedDB write and read throughput in MB/s and reports browser storage quota and usage from the Storage API.

How to interpret results

Use the speeds to compare browsers and spot a very slow drive. They describe the storage path your browser uses — they are not a SMART health percentage.

Troubleshooting tips

If the test fails, check that the browser allows site data and IndexedDB, then retry. For real drive health (wear, bad sectors, temperature) use CrystalDiskInfo or your SSD vendor's toolbox.

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Device Information

View browser-exposed device, screen, touch, language, timezone and online status information.

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QUESTIONS & FIXES

Common ssd questions

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How do I check my SSD health on Windows?

Use CrystalDiskInfo or your SSD vendor's toolbox to read SMART health %, temperature and wear level. This site's SSD test measures browser storage speed and explains the SMART steps, because browsers cannot read SMART data directly.

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SSD vs HDD speed: how big is the difference?

A SATA SSD is typically several times faster than a hard drive for everyday reads, and an NVMe SSD is faster again. If Windows still boots slowly on an SSD, check that the drive is not nearly full and that firmware and drivers are up to date.

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Why is my SSD slow when it is almost full?

SSDs need free space for wear levelling and write caching. Keeping at least 10-20% free, plus enabling TRIM and updating firmware, usually restores normal speed. A nearly-full drive that stays slow after cleanup may be worn.

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What is a good SSD speed?

It depends on the drive: SATA SSDs are typically a few hundred MB/s, NVMe drives are much faster, and browser storage tests measure the browser storage path rather than raw drive speed. Compare runs on the same device and browser.

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