HTML, colors, ASCII and HTTP

HTML Codes and Web Reference

Fast lookup tables, small browser tools and clear guides for people building, fixing and maintaining websites.

Reference

Reference pages for HTML tags, entities, ASCII characters, colors and HTTP responses.

Learn common HTML tags, document structure, semantic elements, forms, media tags and safe HTML entities.

A compact list of HTML tags and entities for quick copying and reference.

Look up HTML color codes, CSS color names, hex values, RGB values and examples for text and background colors.

Numeric character references and common ASCII characters for HTML pages.

Common HTTP responses for browsers, crawlers and servers, from 200 OK to 404 Not Found and 500 errors.

Convert a hex color code to RGB and HSL values directly in the browser.

Convert red, green and blue channel values to a CSS hex color code.

Pick a color and preview its hex, RGB and HSL values for HTML and CSS.

The classic 216 web safe color palette with modern context and hex values.

HTML entities for punctuation, currency, math signs, arrows and symbols.

Copy common HTML symbol codes for arrows, marks, typography and UI labels.