WebGL extends the capability of the HTML canvas element to allow it to render accelerated graphics in any compatible web browser. **DO NOT TAG QUESTIONS ABOUT 3D LIBRARIES (like THREE.js) WITH THIS TAG** unless the question is specifically about a WebGL API feature. **DO NOT TAG QUESTION ABOUT UNITY WEBGL WITH THIS TAG!!**

WebGL is OpenGL ES 2.0 for web pages. It extends the capability of the HTML canvas element to allow it to render accelerated graphics in any compatible web browser.

WebGL is based on OpenGL ES 2.0 and is driven via a JavaScript API. It does not require the use of plug-ins. Official specifications and additional information can be found at Khronos.

Images for minimal reproducible examples

If possible you should try to make minimal reproducible example in a snippit. If you need to load images to show your issue you can access images from imgur. Here's some image URLs you can use

256x256 F        : https//i.imgur.com/ZKMnXce.png
16x16 F          : https://i.imgur.com/fqgm8uh.png
dog              : https://i.imgur.com/KjUybBD.png
plushy bean      : https://i.imgur.com/UKBsvV0.jpg
plushy bean depth: https://i.imgur.com/arPMCZl.jpg
dice with alpha  : https://i.imgur.com/iFom4eT.png
4x2 ramen atlas  : https://i.imgur.com/MuiZgpu.jpg
giraffe          : https://i.imgur.com/TSiyiJv.jpg
jelly donut sign : https://i.imgur.com/v38pV.jpg
zelda fingernails: https://i.imgur.com/CwQSMv9.jpg
earth            : https://i.imgur.com/BpldqPj.jpg

Getting started with WebGL:

Webglfundamentals.org will get you setup with a basic understanding of WebGL and how it works.

Libraries:

WebGL itself only rasterizes graphics. Libraries are generally used to provide 3D or 2D functionality.

Some 3D libraries:

2D libraries

Helper Libraries

References