DevTools Tips

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See formatted JSON responses

Firefox comes with a very nice JSON viewer that makes it easy to review responses from your server directly in the browser window.

You don't even need to open DevTools.

Just enter the URL to a JSON response in a tab, and instead of getting the raw text back, the JSON will be formatted and a toolbar will appear, with buttons to:

Screenshot of the JSON viewer in Firefox

You can try it out with this sample JSON response.