Free JSON, CSV and YAML Tools

Three tools for data files: a JSON formatter that pretty-prints, minifies and validates, a JSON to CSV converter that turns a list of objects into rows and columns you can open in Excel or Google Sheets, and a YAML to JSON converter for configuration files.

API responses, exports from a database and config files often hold customer details or keys, so these tools do their work on your device only. Nothing is uploaded and nothing is kept once you leave the page. Files of many megabytes are fine: the conversion runs in a separate thread, so the page stays responsive.