Terms of Use

Last updated: May 29, 2026

ThumbnailChecker is provided as a free browser-based preview utility. By using the site, you agree to use it responsibly and only with images you have the right to preview or edit.

No performance guarantee

The checker estimates visual basics such as contrast, detail, aspect ratio, and small-size visibility. It does not predict click-through rate, ranking, monetization, or audience response.

Your files and rights

You keep all rights to the images you process. You are responsible for ensuring that your use of any thumbnail, image, text, logo, or face complies with applicable laws, platform rules, and licenses.

No warranty

The tool is provided as is, without warranties of accuracy, availability, or fitness for a particular purpose.

Acceptable use

Do not use the tool to create, distribute, or support unlawful, harmful, deceptive, or infringing content.

Changes

These terms may be updated as the site evolves. Continued use of the site means you accept the updated terms.