DATA CLEANUP / JSON
JSON, made readable.
Check the syntax first. Then format or minify without changing your values.
0 characters
Nothing has been processed.
Paste JSON to begin.
WHAT IT CHECKS
Find the broken character.
Invalid JSON never reaches the result pane. The error stays beside the editor, with a line and column when the browser provides a position.
What formatting changes
Whitespace outside strings. Keys, string content, array order, and numeric text stay as written—even for integers too large for JavaScript to represent exactly.
What to expect
JSON comments and trailing commas are invalid. This tool reports them so you can decide how to repair the source.