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JSON Formateador

Formatea y embellece JSON online gratis. Valida sintaxis, minifica, vista en árbol, resaltado y reportes de error. Editor JSON rápido en el navegador.

JSON Formateador is a free online desarrollador tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.

Herramientas de código diseñadas para desarrolladores con resaltado de sintaxis, validación en tiempo real y formateo. Cobertura completa de JSON, XML, YAML, SQL y más.

How to use

  1. 1 Abre la página de la herramienta JSON Formateador.
  2. 2 Pega tu texto, URL o datos en el área de entrada.
  3. 3 Elige el modo de operación y los parámetros.
  4. 4 Ejecuta la herramienta y revisa el resultado.
  5. 5 Copia o descarga el resultado.

Why we built this tool

As developers ourselves, we kept switching between scattered tools that sent our code to unknown servers. We built this developer suite so formatting, validation, and conversion all run locally — your code stays yours.

About JSON Formateador: what you should know

Full-stack developers, QA engineers, and API integrators who stare at raw JSON payloads every day. When a mobile app returns a 20KB compressed object in a single line of text, or when a third-party API error dumps thousands of unindented characters into a ticket, the formatter is the fastest way to restore human-readable structure without opening an IDE.

Key features

  • Syntax Validation with Line-Precise Errors — Paste any JSON and get a clean tree within milliseconds. If a comma is missing or a quote is unterminated, the error message tells you exactly which character position broke the parse — not just that something is wrong.
  • Configurable Indentation & Sorting — Choose 2-space, 4-space, or tab indentation to match your team style. Keys can be sorted alphabetically, which is useful when diffing two API responses side by side or when preparing fixtures for unit tests.
  • Collapsible Node Tree — Large nested objects become navigable instead of overwhelming. Click any arrow to collapse a subtree while you trace a specific path through the document — especially helpful when hunting down a wrong value buried five levels deep.
  • No Data Sent to Any Server — Everything runs inside your browser. The JSON you paste never leaves your device, even if it contains access tokens, personal records, or internal API responses that should never touch a third-party service.

Common use cases

  • Debugging API Error Responses — When an endpoint returns a cryptic 422 or 500, paste the response body into the formatter to see which field the server rejected. The clean structure makes missing values and type mismatches obvious in seconds.
  • Reviewing Webhook Payloads — Services like Stripe, GitHub, and Shopify send dense webhook JSON. Format it before logging it to a ticket or sharing it with your team so everyone sees the same readable structure.

Preguntas frecuentes

¿Es gratuita esta herramienta?

Sí, completamente gratuita y sin registro.

¿Puedo usarla en el móvil?

Sí, funciona en navegadores móviles con soporte táctil.

¿A qué categoría pertenece?

Desarrollador

¿Qué formatos de lenguajes de programación son compatibles?

Soporta JSON, XML, YAML, SQL, CSV, TOML y más, además de conversión de formato de código para Java, Python, TypeScript, etc.

What code and data formats are supported for formatting and validation?

ToolPure supports JSON, XML, YAML, TOML, CSV, SQL, and Markdown formatting. Validation includes syntax checking, schema validation for JSON, and well-formedness checking for XML.

Can I convert between different data formats?

Yes, you can convert between JSON, XML, YAML, CSV, and TOML. The converter preserves data types, nested structures, and array indices during conversion.

Is there a file size limit for code formatting?

Files up to 10MB can be formatted without issues. For larger files, the tools use Web Workers to prevent UI freezing. Syntax highlighting supports files with up to 100,000 lines.

Is JSON Formateador safe? Is my data uploaded or stored?

Yes. JSON Formateador is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.

🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.

🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.

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