JSON Editor Online - View, edit and format JSON online
CodeBeautify - Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel
Text-Utils JSON Formatter - The JSON Formatter can be used to convert JSON to one line or format it using a specified level of indentation.
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
JSONMate - JSON tree editor, inspector and beautifier
HtmlStrip - Htmlstrip.com is a toolbox for the web. It contains hundreds of tools associated with the web and computers in general.