Инструменты

Best Online XML Viewer, XML Formatter, XML Editor, Analyser, Beautify-Beautifier, Minify, Tree structure
https://codebeautify.org/xmlviewer

Best JSON Viewer and JSON Beautifier Online
https://codebeautify.org/jsonviewer

Best HTML Formatter and Beautifier
https://codebeautify.org/html-formatter-beautifier

JSON Diff - Online JSON Compare Diff Finder
https://json-diff.com/

Compare XML files and find Difference Online | TextCompare
https://www.textcompare.org/xml/

Best XML to JSON Converter Online to convert XML to JSON String, URL and File
https://codebeautify.org/xmltojson

Rendera - Online HTML5 Editor
http://www.rendera.org/

Base64
https://base64.guru/