MdCopy is a free Chrome add-on developed by aki. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory.

With MdCopy, users can easily copy and format selected text from web pages into Markdown syntax. The add-on automatically converts the selected text into a format that is suitable for pasting into Markdown documents. This is incredibly useful for anyone who frequently writes articles or documents using Markdown.

The add-on provides two options when right-clicking on selected text in the browser. Users can choose to copy the selected text along with the URL of the page in the format of "[selected text](URL)", or they can choose to copy the selected text as a quote with the ">" symbol before the text.

Overall, MdCopy is a convenient tool for anyone who works with Markdown and frequently needs to copy and format text from web pages. Its simple functionality and ease of use make it a valuable addition to any writer's toolkit.