jsonchecker.in is a free toolkit for working with JSON. It is built for developers, testers, analysts and students who need to validate, format, convert and compare JSON quickly, without installing anything or signing up.
What you can do
Check JSON and find errors by line and column, beautify or minify it, convert between JSON, CSV and YAML, compare two documents, and explore large payloads in a collapsible tree.
Privacy by design
All processing happens inside your browser. The JSON you paste is never sent to our servers, so it is safe to use with private configuration files and API responses.
Get in touch
Have a bug report or an idea for a new tool? Visit the contact page.