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GeekFormat

JSON Repair

Related

JSON Escape / Unescape

JSONPath Query

XML to JSON

JSON to YAML

Markdown Formatter

Excel to CSV

Features

  • AI engineering defense: optimized for LLM output, auto-strips Markdown markers, intelligently corrects non-standard JSON from AI hallucinations, building a reliable AI data defense system
  • All-in-one syntax repair: auto-detects and fixes trailing commas, single quotes, unquoted keys, comments, and more — perfectly suited for Python/Go multi-language development scenarios
  • High fault-tolerance data recovery: built-in smart fault-tolerance algorithm for broken JSON from log truncation or network issues, auto-infers and closes brackets and strings to maximize data recovery
  • Cross-language logic replication: perfectly replicates core logic of mainstream `json_repair` libraries, helping developers quickly validate dirty data fixes and improve API fault tolerance and data pipeline stability
  • Local fast processing: pure browser-side computation, no server upload needed, ensuring sensitive business data privacy with ultra-fast zero-latency processing

FAQ

How to perfectly fix non-standard JSON from LLM/AI output?

LLMs like ChatGPT and Claude often output JSON wrapped in Markdown code blocks, with comments, single quotes, or missing brackets. Our tool has a built-in AI output defense algorithm that automatically strips Markdown markers, converts single quotes to double quotes, removes comments, and intelligently closes structures — turning AI-generated non-standard JSON into valid data instantly.

What common JSON syntax and dirty data errors can be fixed?

The tool supports comprehensive syntax repair, including: removing trailing commas, fixing unquoted keys, handling unclosed strings or braces, removing JavaScript-style comments, and repairing broken JSON structures caused by log truncation.

What should I do when I get JSON parse errors in Python or Go?

This tool perfectly replicates the core logic of Python `json_repair` and Go `JSONRepair` libraries. If you encounter `json.JSONDecodeError` or similar parse errors in development, you can first validate the fix here, get standard JSON, and then debug your code — greatly improving backend development and data pipeline fault tolerance.

Can truncated or incomplete JSON data from network issues be recovered?

Yes. For JSON truncation caused by network interruptions or incomplete log records, the tool has a built-in high fault-tolerance recovery algorithm that intelligently infers and closes missing brackets and quotes, maximizing data structure recovery and minimizing data loss risk.

Will online JSON repair expose my private data?

No. All JSON Repair processing happens entirely in your browser locally. Your data is never uploaded to any server. Whether it's sensitive enterprise API logs, AI prompt data, or personal configs, you get enterprise-level privacy protection.