Terms of use

Last updated: 19 October 2026

About these terms

DeviceCheck (devicecheck.online) is run by Mark Davies (47 Ravenswood Road, London SW12 9PN), an individual based in England, United Kingdom ("we", "us"). These terms apply when you use the site. By using it, you agree to them. If you don't agree, please don't use the site.

The service

DeviceCheck gives you free tools that run in your browser to check screens, microphones, webcams, speakers, keyboards, mice and game controllers. You don't need an account. We may change, add or remove tools, or pause the site, at any time. We can't promise the site will always be available or free of errors.

Results are indicative, not a professional diagnosis

Results are a guide to help you check your equipment. They depend on your browser, operating system, device, drivers and settings. They may not find every fault, and they can sometimes show a problem that isn't really there. Measured numbers (such as refresh rate, polling rate, clicks per second and reaction time) are estimates.

Results are not a professional diagnosis. Please don't rely on them alone for a repair, a return or a warranty claim. Check with the manufacturer, the seller or a qualified technician. The sound test is not a hearing test. If you are worried about your hearing or eyesight, talk to a health professional.

Health and safety

Flashing lights and photosensitivity

The stuck pixel fixer in the dead pixel test flashes bright colours very quickly, many times a second. The full-screen colour tests and the dead pixel test also fill the screen with bright colours that change when you click, and the motion test shows a fast-moving block.

Don't use the stuck pixel fixer, or any flashing or fast-changing mode, if you or anyone who can see the screen has photosensitive epilepsy or is sensitive to flashing lights. Don't look straight at the fixer while it runs. Stop straight away and look away if you feel dizzy, see changes in your vision, have twitching eyes or muscles, feel confused, or have any movement you can't control. If that happens, get medical advice before using the site again.

Sound

Start sound tests at a low volume and turn it up slowly, especially with headphones. Very high and very low tones can be unpleasant and, at high volume, can damage your hearing or your speakers.

Screens

Bright full-screen colours, such as the white screen, can be dazzling, especially in the dark. Don't stare at a bright screen for a long time.

Trying to fix a device

The stuck pixel fixer and the tips in our guides may not fix a fault. You try them at your own risk. If your device is under warranty, check the manufacturer's advice first.

Fair use

Please don't:

• use the site for anything illegal or harmful;
• attack the site, try to break its security, or overload it, for example with automated tools;
• copy large parts of the site, or put it inside another website, without our permission;
• click ads you aren't interested in, or ask others to.

Our content

The text, design and code of DeviceCheck belong to us or are used with permission. You're welcome to link to any page and share it. You may print or save pages for your own personal use.

Trademarks

Product and brand names on this site belong to their owners. They are used only to describe devices and compatibility. For example, PlayStation is a trademark of Sony Interactive Entertainment; Xbox, Windows and Microsoft Teams belong to Microsoft; iPhone, iPad and Safari belong to Apple; Chrome and Android belong to Google; Firefox belongs to Mozilla; Zoom belongs to Zoom Communications; Steam belongs to Valve; and Bluetooth belongs to Bluetooth SIG. DeviceCheck is independent. It is not affiliated with, sponsored or endorsed by any of them.

Adverts and links to other sites

Adverts are provided by Google, and we don't choose each one. Links and adverts may take you to other websites. We aren't responsible for their content, products or privacy practices.

Our responsibility to you

DeviceCheck is free and provided "as is". As far as the law allows, we don't give any promises about the site or its results beyond those in these terms.

Nothing in these terms limits or excludes our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for anything else that the law doesn't allow us to limit or exclude. Your legal rights as a consumer are not affected.

Apart from that, we are not responsible for loss or damage that wasn't foreseeable, or for business losses (the site is for personal use). As far as the law allows, our total liability to you for anything to do with the site is limited to £100.

Your privacy

Our privacy policy and cookies page explain how information is used.

Changes to these terms

We may update these terms, for example when we add a tool or the law changes. The date at the top shows the latest version. If you keep using the site after a change, the new terms apply.

Law and courts

These terms are governed by the law of England and Wales. Any dispute will be dealt with by the courts of England and Wales. If you live in Scotland or Northern Ireland, you can also bring a claim in your local courts. If you live in the EU, you keep the protection of your own country's consumer law and can bring a claim where you live.

Contact

Questions about these terms? Email info@devicecheck.online.