Reference & converters

Convert image files to Base64 data URLs directly in your browser.

Convert common HTML content into clean Markdown text.

Convert values between binary, octal, decimal, hexadecimal and base36.

Convert decimal numbers to Roman numerals and validate Roman strings.

Search common HTTP response codes with class and meaning.

Map file extensions to MIME types for accurate Content-Type headers.

Lookup characters, symbols and emoji by codepoint, name or category.

Search common Mac and Windows productivity keyboard shortcuts quickly.

Lookup common HTML named colors with HEX and RGB values.

Quick Markdown syntax reference for headings, lists, tables and links.