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
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
JSON Editor Online - View, edit and format JSON online
BURN.link - Send secure, encrypted, self-destructing messages
JSONLint - JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Boop - A scriptable scratchpad for developers. Free & open source!