What happens if my JSON is invalid?

You'll see a clear error message describing the problem instead of a formatted result.

Is my JSON data uploaded anywhere?

No — formatting uses your browser's native JSON parser and never sends data to a server.

Does formatting change the actual data?

No — only whitespace and indentation change; keys, values and structure remain identical.

Can I use a custom indent size?

Yes — choose any indent size from 1 to 8 spaces.

Does this support very large JSON files?

Yes, limited only by your browser's available memory.

What is the difference between this and the JSON Beautifier?

They work almost identically; the Beautifier additionally offers a tab-indent option alongside numeric space counts.

Herramientas JSON y Código

Formateador de JSON — Herramienta Gratuita en Línea

Formatea e indenta JSON desordenado en una estructura legible.

Usar Esta Herramienta

Funciona en Tu Navegador
Resultados Instantáneos
100% Privado

Your Text

Indent size

Saber Más

What Is a JSON Formatter?

A JSON formatter takes minified or inconsistently indented JSON and rewrites it with clean, consistent indentation, making nested objects and arrays easy to read and debug at a glance.

This is especially useful when working with API responses, which are almost always returned minified to save bandwidth — pasting one into a formatter instantly reveals its structure without needing to trace matching brackets by eye.

¿Quién Usa Esta Herramienta?

Para Empresas

Inspect a minified API response to understand its structure.

Para Uso Personal

Read a configuration file that was saved without formatting.

Para Estudiantes

Learn JSON structure for a web development or API course.

Para Oficinas

Format a data export for easier manual review.

Por Qué Usar Esta Herramienta

Características Clave

Custom Indent Size

Choose an indent size from 1 to 8 spaces.

Instant Formatting

Output updates immediately as you paste in JSON.

Clear Error Messages

Invalid JSON shows exactly what went wrong.

100% Private

Your data is never uploaded — formatting happens entirely in your browser.

El Resultado

Beneficios

Instantly Readable

Turn a wall of minified JSON into a clearly indented structure.

Faster Debugging

Spot missing brackets or misplaced values much more easily once formatted.

Nothing Uploaded

Safe for sensitive API payloads, since nothing leaves your browser.

Paso a Paso

Cómo Usar Formateador de JSON

Paste Your JSON

Add minified or messy JSON into the input box.

Choose an Indent Size

Pick how many spaces to indent each level.

Copy the Formatted Result

Use the Copy or Download button to grab the result.

Especificaciones

Detalles Técnicos

Detalle	Valor
Entrada	Valid JSON text
Procesamiento	No practical limit — handled entirely by your browser
Salida	Exact, lossless re-formatting using the native JSON parser

Puedes Verificarlo

Privacidad y Seguridad

Lo que realmente sucede con tu archivo al usar esta herramienta.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Obtén Mejores Resultados

Consejos

Use 2 Spaces for Web Projects

2-space indentation is the most common convention for JSON in web projects.

Check the Validator First on Large Payloads

If formatting fails, use the JSON Validator to pinpoint the exact error.

Preguntas Frecuentes