Search a browser-based MIME types reference by file extension to get the correct content-type value, such as application/json for .json or image/png for .png. It loads in your browser and needs no account.
When a server sends a file, the Content-Type header tells the browser or client what the bytes are, so it can render, download or parse them correctly. Setting the wrong type, or a generic one, can make files download instead of display or break an upload. A MIME reference maps a file extension to its standard content-type so your headers are right.
Whether you are configuring a static server, validating an upload, or setting a Content-Disposition, you often just need the exact MIME string for an extension. A client-side reference lets you search for the extension in your browser and read the value, with nothing sent to a server. It is free and needs no sign-up.
The standard content-type for JSON is application/json.
It tells the client how to handle the file, so the wrong type can break rendering, uploads or downloads.
No. The reference runs in your browser, so nothing is uploaded.