JSONFormatter.org - Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
CodeBeautify - Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel
WTOOLS.io - Free Online Web Tools. Kit of tools such as generators, minifiers, formatters, checkers, converters, seo and much more
HtmlStrip - Htmlstrip.com is a toolbox for the web. It contains hundreds of tools associated with the web and computers in general.
JSON Editor Online - View, edit and format JSON online
SASS Compiler - Generate CSS code from sass source using SASS Compiler. Beautify CSS if necessary.