About I/O Checkup

A clearer starting point for hardware problems

A key stops responding. Your microphone sounds quiet. A printer leaves a stripe. We built I/O Checkup to help you investigate those everyday problems before changing settings at random or replacing a device.

Choose the hardware in front of you, run a focused check, and compare what happens. We explain what the browser can observe and where a result needs another test or a manufacturer diagnostic.

Who publishes this site?

I/O Checkup is published by Vigneshwaran Vijayakumar, a developer based in India. The aim is to make useful hardware checks accessible without installing a diagnostic suite or creating an account.

• Meet Vigneshwaran Vijayakumar
• Vigneshwaran Vijayakumar on LinkedIn

What you can expect

We keep the test itself prominent and put deeper explanations below it. Camera and microphone checks require your permission. Browser limits are part of the explanation, not something to hide behind a score.

I/O Checkup is an independent website. A reference to a browser, device, or manufacturer does not imply endorsement or certification.

• How our tests work
• Report a problem