Paste JSON to validate it and get the exact line and column of the first syntax error.
Only validated locally — nothing is uploaded.
Valid JSON
Yes
Valid JSON — Calculated outcome. Derived from your inputs via the displayed formula; use to plan.
Message
Valid JSON.
Message — Calculated outcome. Derived from your inputs via the displayed formula; use to plan.
Line
—
Line — Calculated outcome. Derived from your inputs via the displayed formula; use to plan.
Column
—
Column — Calculated outcome. Derived from your inputs via the displayed formula; use to plan.
Paste any JSON payload to check whether it parses. If it fails you get the exact line and column of the first error, which speeds up debugging API bodies and config files.
Formula
JSON.parse(text) with error position extraction
Worked examples
FAQ
Does validating JSON execute code?
No. JSON parsing only reads the text and never runs anything embedded in it.
Where does parsing happen?
Entirely in your browser — your text is never sent to a server.