What JSON errors can the repair tool fix?

The tool fixes missing closing brackets and braces, trailing commas, single quotes instead of double quotes, unquoted property names, missing commas, comments (// and /* */), and truncated JSON. It can often reconstruct valid JSON from partially broken input.

How does JSON Repair work?

The tool uses a parser that understands common JSON mistakes. It reads the input character by character, identifies structural problems, and applies the minimal fixes needed to produce valid JSON while preserving your original data.

Can JSON Repair fix my truncated API response?

In many cases, yes. If your JSON was cut off mid-stream (like a network timeout), the tool can close open strings, arrays, and objects to produce valid JSON. Some truncated data will obviously be lost.

Can it fix malformed AI JSON output?

Often, yes. AI-generated JSON commonly fails because of comments, single quotes, trailing commas, or partial objects. JSON Repair can usually clean those issues up so you can validate the output or pass it into a schema check.

Will the repair tool change my data?

The tool makes minimal changes — only what's needed to make the JSON valid. It preserves all your values, keys, and structure. The fixes applied are listed so you can review exactly what changed.

Reparador JSON

Corrige errores comunes: comas finales, comillas, etc.

Broken JSON

Loading editor...

Repaired JSON

Loading editor...

Recover broken JSON instead of typing fixes by hand

AI tools and APIs don't always produce perfect JSON. Trailing commas, single quotes, comments, unquoted keys, half-truncated objects — every one of those will fail JSON.parse and stop your pipeline. A repair tool reads the broken input character by character and applies the minimum fixes needed to make it valid, preserving your data.

Use the repair tool when you need to

Fix malformed AI model output

Strip Markdown fences, repair single quotes, and close truncated objects so structured output becomes parseable.

Recover a half-broken API response

When a network blip cut a response mid-stream, repair closes open strings, arrays, and objects to salvage what arrived.

Clean up copied JSON from logs or chat

Logs often paste JSON with smart quotes, trailing commas, or extra wrapping — fix it instead of editing line by line.

How to repair JSON quickly

1
Paste the broken JSON into the editor.
2
Click Repair to apply the minimum fixes for valid syntax.
3
Validate the repaired output, then copy or feed it into the next step in your pipeline.

Keep going

Validate after repairing

Confirm the repaired output parses cleanly before feeding it into downstream code.

Repair and schema-validate at once

Combine repair with schema validation for AI model output and tool calls.

Format the result

Pretty-print the repaired JSON to read and review the changes.

Understand parser errors

Learn what each common error message means before deciding to repair.

Common repair workflows

Salvage AI tool-call output

Strip fences and trailing commentary from model output before passing it into a JSON parser.

Recover an interrupted API response

Close truncated objects and arrays to extract whatever data made it through the wire.

Clean up logged payloads

Repair JSON copied from log lines that lost or corrupted some characters in transit.

Herramientas relacionadas

Validador JSON

Valida JSON con mensajes de error detallados y números de línea

LLM JSON Output Validator

Repair and validate model JSON output against a schema

Visor JSON

Explora JSON con vistas de árbol, tabla y texto

Formateador JSON

Embellece y formatea JSON con sangría configurable

Preguntas frecuentes

Corrige llaves y corchetes de cierre faltantes, comas finales (trailing commas), comillas simples en lugar de dobles, nombres de propiedades sin comillas, comas ausentes, comentarios (// y /* */) y JSON truncado. A menudo puede reconstruir un JSON válido a partir de una entrada parcialmente rota.

Usa un parser que reconoce errores comunes en JSON. Lee la entrada carácter por carácter, detecta problemas estructurales y aplica los cambios mínimos necesarios para producir un JSON válido, intentando conservar tus datos originales.

En muchos casos, sí. Si tu JSON se cortó a mitad (por ejemplo, por un timeout de red), la herramienta puede cerrar strings, arrays y objetos abiertos para obtener un JSON válido. Eso sí: parte de la información truncada se perderá.

Hace cambios mínimos: solo lo necesario para que el JSON sea válido. Mantiene valores, claves y estructura. Además, lista las correcciones aplicadas para que puedas revisar exactamente qué se modificó.