Data Formats (JSON, CSV)
JSONCompare - The Advanced JSON Linting & Comparison Tool - web tool to input and validate JSON code, upload and validate multiple (batch) JSON files simultaneously, and also compare (diff) and merge two JSON objects.
json-editor/json-editor: JSON Schema Based Editor - uses JSON scheme to generate a HTML form
Table Convert Online - table to markdown, csv, json, latex table, excel, sql, xml
JSON Editor Online - view, edit and format JSON online