// Free browser tool
JSON Formatter and Validator
Validate JSON, format it with readable indentation or minify it without sending the input to a server.
Uses JavaScript JSON parsing. Large integers can lose precision; duplicate keys collapse. Keep an original copy for lossless data.
Valid JSON
Private by design.Your input is processed in your browser and is not stored.
How to use it
Paste an API response, OpenAPI fragment or configuration object. Valid JSON can be formatted or minified; invalid input returns the parser error.
Related tools
// FAQ
Questions, answered.
// GET STARTED
Turn the result into an API workflow.
Import a definition, test the endpoint and generate integration code in a REST Test workspace.