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JSON Validator (Find the Error)

Check if JSON is valid and see the exact line and column of any mistake, with a tip to fix it.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Most JSON errors are a missing comma, a comma at the end of a list, single quotes instead of double quotes, or a key without quotes.

How to use it (step by step)

  1. 1Type or paste your text into the “JSON to check” box. There is already an example in it so you can see how it works; press Clear to start with your own.
  2. 2The answer appears right away in the “Result” box. No button needed.
  3. 3Press Copy and paste the result wherever you need it.

Words to know

JSON
A common text format apps use to store and send data, made of names and values in { } brackets.
Array / list
An ordered collection of items, like ["apple", "banana"]. Every programming language has one.

More in Developer

JSON String Escape / UnescapeTurn text into a safe JSON string (\n, \", \\) or turn an escaped string back into normal text.JSON Key Sorter (A–Z)Sort every key in a JSON object alphabetically, at every level, to compare or tidy files.JSON Compare (Diff Two JSON)Compare two JSON documents and list every added, removed and changed value by its path.JSON Repair (Fix Broken JSON)Fix almost-JSON: single quotes, keys without quotes, trailing commas, comments, Python True/None.JSON to XML ConverterConvert JSON into well-formed XML with your own root element name.JSON to Go StructGenerate Go structs with json tags from sample JSON, including nested objects and lists.