JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
DevToys - A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.
JSON Editor Online - View, edit and format JSON online
Lipsum - One of the oldest and fastest 'lorem ipsum' (random text) generators.
JSON Formatter & Validator - The JSON Formatter was created to help with debugging.
Lipsum.pro - The superfast Lorem Ipsum text generator