The JNG test-suite is designed to test the JNG capabilities of your browser or image-viewer.

The latest version of this test-suite can be found on libmng.com.

To test your image-viewer you can also download the test-suite in a single zip-file.


There are 2 sets containing several test-pages: The first set is based on the <IMG> tag. This can be used to test browsers that have native support for JNG. The second set is based on the <EMBED> tag. It can be used to test plugins that support JNG.

<IMG> tag

<EMBED> tag

Test JPEG compression types. Non-transparent.

Test JPEG compression types. Non-transparent.

Test JPEG compression types. Transparent.

Test JPEG compression types. Transparent.

Test large progressive display color. Non-transparent.

Test large progressive display color. Non-transparent.

Test large progressive display Gray. Non-transparent.

Test large progressive display Gray. Non-transparent.

Test large progressive display color. Transparent.

Test large progressive display color. Transparent.

Test large progressive display Gray. Transparent.

Test large progressive display Gray. Transparent.

Test color-correction by difference. Non-transparent.

Test color-correction by difference. Non-transparent.

Test color-correction by similarity. Non-transparent.

Test color-correction by similarity. Non-transparent.