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What Is JSON?

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In this video, you’ll learn what JSON is and where it’s used.

JavaScript Object Notation (JSON) is a standardized format commonly used to transfer data as text that can be sent over a network. It’s used by lots of APIs and Databases, and it’s easy for both humans and machines to read.

JSON represents objects as name/value pairs, just like a Python dictionary.

You can start using JSON right away with the built-in module:

import json

Serialization is the process of encoding data into JSON format (like converting a Python list to JSON).

Deserialization is the process of decoding JSON data back into native objects you can work with (like reading JSON data into a Python list).

Brett Boresow on April 14, 2019

Solid overview!

Ashish on Jan. 14, 2020

HI. Video not getting loaded after 2 minute 10 seconds on page realpython.com/lessons/what-is-json/

Is there some video file issue?

Dan Bader RP Team on Jan. 15, 2020

Hi Ashish, the video seems to load and play fine for me and I’m also seeing in the server logs that it’s working for others. This might be a browser or connectivity issue on your end. We’ve got this video troubleshooting support article in our knowledge base that should help you get it resolved. If those tips don’t work please send us an email at info@realpython.com and we’ll debug it together :) Best, Dan

Ashish on Jan. 15, 2020

Thanks Dan. It’s working for me now. Could be a temporary glitch.

Regards Ashish

Roy Telles on April 11, 2020

Is it possible to upload transcripts to video lessons? Sometimes I’m not in the best situation to listen to audio but would still like to take notes while following along :) thanks!

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