JSON validator

Check whether JSON is valid and see the exact line and column of any mistake.

Your data
  • Runs on your device. Files are never uploaded.
  • Free and unlimited. No sign-up, no watermark.
1

Add your file

Choose or drop it in. It opens right here in your browser.

2

Pick the settings

Or keep the defaults, which suit most files.

3

Download

Your file is made on your own device, then saved like any download.

More data / json tools

JSON formatterIndent messy JSON so it is easy to read, keeping every number exactly as written.JSON compareList every value that was added, removed or changed between two JSON files.JSON minifierRemove all spaces and line breaks from JSON to make it as small as possible.JSON beautifierTurn one-line or untidy JSON into neatly indented JSON.JSON escapeEscape text (quotes, line breaks, tabs) so it can go inside a JSON string.JSON unescapeTurn an escaped JSON string (\n, \", \u00e9) back into plain text.JSON diffSee a line-by-line diff of two JSON files, with key order ignored.JSON path testerTry a JSONPath expression on your JSON and see what it matches.