JSON ToolsFree online tool

JSON Repair

No. It only applies conservative syntax repairs and reports an error when the data is ambiguous.

Repair common JSON mistakes such as trailing commas, comments, single quotes, and unquoted keys.

Free online toolNo signup requiredBrowser-first workflow

Interactive tool

Use Repair

Focused inputs, clear output, and practical defaults for a fast json workflow.

JSON-like inputjson

Repaired JSON

1{2  "name": "Toolsera",3  "tools": [4    "formatter",5    "repair"6  ]7}

Removed JavaScript-style comments.

Applied

Converted single-quoted strings to double-quoted strings.

Applied

Quoted unquoted object keys.

Applied

Removed trailing commas.

Applied

Useful for

Fix copied JavaScript objectsClean broken config snippetsNormalize pasted JSON-like data

Built as a focused browser utility so users can inspect inputs and outputs without a long setup flow.

What JSON mistakes can be repaired?

It handles common non-JSON patterns including comments, trailing commas, single quoted strings, and simple unquoted keys.

Will it guess missing values?

Continue the workflow with tools that pair naturally with this one.