Oli Oli - 5 months ago 33
JSON Question

What is the correct JSON content type?

I've been messing around with JSON for some time, just pushing it out as text and it hasn't hurt anybody (that I know of), but I'd like to start doing things properly.

I have seen so many purported "standards" for the JSON content type:

application/json
application/x-javascript
text/javascript
text/x-javascript
text/x-json


But which is correct, or best? I gather that there are security and browser support issues varying between them.

I know there's a similar question, What MIME type if JSON is being returned by a REST API?, but I'd like a slightly more targeted answer.

Answer

For JSON text:

The MIME media type for JSON text is application/json. The default encoding is UTF-8. (Source: RFC 4627).

For JSONP with callback:

application/javascript

Here are some blog posts that were mentioned in the comments that are relevant.