Explorer
Tree explorer will appear here once JSON is loaded
Inspector
Select a node to inspect it
Tree explorer will appear here once JSON is loaded
Select a node to inspect it
Paste your JSON and Jsontify validates it as you type. A green status means it parsed cleanly; an invalid document shows the precise line and column of the first problem, plus a plain-English message - "Trailing comma before }", "Object keys must use double quotes", and so on, instead of a generic parser error.
The tree view keeps showing your last valid structure, dimmed, while you fix the error, so you never lose your place staring at a blank panel. A "Go to error" button jumps the raw editor straight to the offending character.
Validation is strict RFC 8259 JSON by default - the common mistakes people paste in from LLM output or hand-edited config files (trailing commas, single-quoted strings, unquoted keys, // comments, NaN/Infinity, a truncated response cut off mid-object) are all detected and flagged as repairable, so if you just need working JSON rather than a strict validation report, the Repair button on the same page will usually fix it in one step.
Validation happens entirely client-side in a background worker, so pasting a large or sensitive API response to check its shape never sends that data anywhere.