EZ Formatter

JSON Repair

Repair can infer missing punctuation but cannot recover data that was never received. Compare the repaired values and structure before using the result.

No input

Broken JSON Input

Repaired JSON Output

What Can Be Repaired

Missing quotes around keys and strings
Single quotes replaced with double quotes
Trailing commas in objects and arrays
Missing closing brackets and braces
JSON with // and /* */ comments
Truncated JSON from LLM / API output
Prose text wrapped around JSON
Unescaped newlines inside strings
Python-style None / True / False literals

JSON Repair

Frequently Asked Questions: Can the tool repair truncated or incomplete JSON?

Repair can infer missing punctuation but cannot recover data that was never received. Compare the repaired values and structure before using the result.

Authoritative References

Standards and official documentation that define the formats this tool works with.

RFC 8259 - The JavaScript Object Notation (JSON) Data Interchange Format

The IETF standard that defines the JSON data interchange format and its grammar.

JSON - json.org

The original JSON site by Douglas Crockford, with the format introduction in many languages.

MDN Web Docs - Working with JSON

Mozilla guide to working with JSON in JavaScript: parse, stringify, and revivers.

JSON - Wikipedia

JSON data types, syntax history, and its rise as the dominant API interchange format.

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