Flask, setting JSON in a cookie, and decoding it on the client (in javascript)

I’m setting a cookie in Flask like follows : If i print json.dumps(someObject) on the server I get : On the client side it becomes : I want to decode it on a javascript client what format is it exactly ? I’d like to decode it and pass it to angular.fromJson(), it looks like there is at least unescaping (of the the “) to do, but I’m surprize to see 54 (the octal ASCII code for the comma) Answer The cookie value is quoted by the Werkzeug library to be safe for use in Cookie headers; this includes quoting any