No. All repairs happen locally via WebAssembly; no JSON is sent to any server.

What kinds of errors can it fix?

Common issues like missing quotes, stray commas, unbalanced brackets, and incorrect escape sequences.

Paste or type your malformed JSON, optionally parse or unescape sequences, then click Repair JSON to get a valid result.

JSON Repair Online

Q: What is JSON Repair Online?

JSON Repair Online is a free web tool to automatically fix malformed JSON. It runs entirely in your browser for speed and privacy.

Fix malformed JSON online — fast, private, and accurate. Runs fully in your browser with no uploads.

Fix malformed JSON online, safely

Use this free JSON repair online tool to automatically correct common JSON syntax errors. It can handle quotes, commas, brackets, and escape sequences. Your data never leaves your device.

Malformed JSON Input:

转义处理说明：
• 解析转义序列：将 \n, \t 等转义序列转换为实际的换行符、制表符等
• 去转义：处理被转义的引号等字符，如 \" → "
• 高级去转义：适用于从其他地方复制的引号包围的JSON字符串
• 推荐使用顺序：先"解析转义序列"，再"修复JSON"

Repaired JSON Output:

FAQs about JSON Repair Online

What is JSON Repair Online?

It's a browser‑based tool that automatically fixes malformed JSON quickly and privately.

Is it private?

Yes. Everything runs locally in your browser via WebAssembly; nothing is uploaded.

What errors can it fix?

Missing quotes, extra commas, unbalanced brackets, and bad escape sequences, among others.