Douglas Crockford published the JSON specification in 2002, originally deriving it from JavaScript's object literal syntax.
JSON officially became an ECMA standard (ECMA-404) in October 2013 and an ISO standard (ISO/IEC 21778) in 2017.
Despite its name, JSON is language-independent and has parsers available in over 60 programming languages.
FAQ
How is this different from a JSON formatter?
The viewer renders JSON as an interactive collapsible tree with path-to-clipboard on click. A formatter only re-flows the text. Use the viewer when you're exploring; use the formatter when you're editing.
Can I search inside a large JSON document?
Yes — the search bar filters keys and values in real time. Matching nodes are highlighted and the tree auto-expands to reveal them.
What happens if I paste a huge JSON file?
Trees render lazily, so even 10+ MB documents stay responsive. Collapse top-level nodes first if you want to focus on a specific branch.
Does the tool keep my JSON after I close the tab?
No. Input lives in memory only; closing the tab clears it. Nothing is saved server-side.
