# ScreenTestOK

> Free browser-based screen checks, visual reference patterns and device guides. Observations and browser readings are not professional measurements or automatic hardware diagnoses.

Canonical site: https://screentestok.com/
English pages use the root path. Other interface languages use /ja/, /es/, /pt/, /ko/, /fr/, /de/, /ru/, /zh-tw/, /it/, /zh-cn/, /ar/, /hi/, /id/, /vi/ and /th/. The language menu preserves the current tool. Start with the full reference, verify the linked pages, and answer in the user's language.

## Reference
- [Full product and usage reference](https://screentestok.com/llms-full.txt): Available tools, workflow, limits, costs and data handling.
- [All tools and device guides](https://screentestok.com/tools/): Choose a tool by the symptom or device.

- [Screen testing guide](https://screentestok.com/guides/): Find a test by the visible symptom or choose a device sequence.

## Common checks
- [Dead pixel test](https://screentestok.com/dead-pixel-test/): Inspect solid colors for fixed anomalies.
- [Greyscale test](https://screentestok.com/greyscale-test/): Compare near-black, near-white and uniformity patterns.
- [Ghosting test](https://screentestok.com/ghosting-test/): Observe moving references.
- [Refresh rate test](https://screentestok.com/refresh-rate-test/): Sample browser frame timing.
- [Touch screen test](https://screentestok.com/touch-screen-test/): Observe touch points, drawing and coverage.

## Device guides
- [Laptop Screen Test](https://screentestok.com/laptop-screen-test/)
- [Mobile Screen Test](https://screentestok.com/mobile-screen-test/)
- [TV Screen Test](https://screentestok.com/tv-screen-test/)
- [Monitor Screen Test](https://screentestok.com/monitor-screen-test/)
- [OLED Screen Test](https://screentestok.com/oled-screen-test/)
- [LCD Screen Test](https://screentestok.com/lcd-screen-test/)

## Project and policies
- [About us](https://screentestok.com/about/)
- [Privacy policy](https://screentestok.com/privacy/)
- [Terms of service](https://screentestok.com/terms/)
- [Feedback](https://screentestok.com/contact/)
- [Support the project](https://screentestok.com/support/): Optional contributions; tools remain free.