Precise JSON errors
A dedicated parser reports the line, column and nearby source text, and warns when an object repeats the same key.
Private structured data workspace
Pagan JSON & Data Studio
Validate JSON precisely, explore nested values, inspect CSV as a table and convert between both formats without sending your data anywhere.
Your data stays inside this tab
The parser, tree, table and converters are first-party JavaScript. There is no upload endpoint, external formatter or analytics request carrying your content.
Validation failed
The data could not be parsed
Line 1, column 1
Analysis result
Valid JSON
JSON actions
CSV actions
Real CSV quoting
Quoted commas, embedded line breaks, doubled quotes and comma, semicolon, tab or pipe delimiters are parsed locally.
Safe spreadsheet export
Formula-looking cells can be prefixed during CSV export to reduce accidental execution when opened in spreadsheet software.