1. https://codebeautify.org/jsonviewer#
Best JSON Viewer and JSON Beautifier Online
Online JSON Viewer, JSON Beautifier and Formatter to beautify and tree view of JSON data - It works as JSON Pretty Print to pretty print JSON data.
codebeautify.org
JSON Crack - Crack your data into pieces
Simple visualization tool for your JSON data. No forced structure, paste your JSON and view it instantly.
jsoncrack.com