Convert text to binary and the other way for any string input.
Convert text to ascii and the other way for any string input.
Convert text to decimal and the other way for any string input.
Validate JSON content and make it looks good.
Get the gravatar.com globally recognized avatar for any email.
Get details of any file type, such as the mime type or last edit date.
Get the web-host of a given website.
Convert markdown snippets to raw HTML code.
Get & verify the meta tags of any website.