How do I format JSON online?

Paste your JSON into the editor and click Format. You can choose 2-space, 4-space, or tab indentation. The tool runs entirely in your browser — nothing is sent to a server.

Why is my JSON not formatting correctly?

Make sure your JSON is valid first. Common issues include missing closing brackets, trailing commas, unquoted keys, or single quotes instead of double quotes. Try our JSON Repair tool to auto-fix these problems.

Can I sort JSON keys alphabetically?

Yes. After formatting, use the Sort Keys option to alphabetically order all keys throughout the entire JSON document, including nested objects.

Is it safe to paste sensitive JSON data?

Completely safe. JSONTech processes everything in your browser using JavaScript. No data is ever transmitted to any server. You can verify this in your browser's Network tab.

What's the difference between JSON Formatter and JSON Beautifier?

They're the same thing. JSON Formatter, JSON Beautifier, and JSON Pretty Printer all describe the process of adding indentation and line breaks to make minified JSON readable.

Formateador JSON

Embellece y formatea JSON con sangría configurable

Sort keysAuto-format

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Format raw payloads before you debug them

When an API response arrives minified or deeply nested, formatting is the fastest way to make the structure readable. It turns a one-line blob into something you can scan, diff, review, and share without losing the original data.

Use the formatter when you need to

Pretty-print a minified response

Expand compressed JSON so nested arrays, objects, and values are easy to inspect.

Normalize fixtures before code review

Apply consistent indentation and optional key sorting so diffs stay clean and predictable.

Prepare payloads for docs or tickets

Share readable request and response examples without manually editing whitespace.

How to format JSON quickly

1
Paste the JSON payload or upload a file.
2
Choose 2 spaces, 4 spaces, or tabs and enable key sorting if needed.
3
Click Format, then copy the cleaned result or download it for reuse.

Keep going

Validate after formatting

Check syntax and get exact line and column errors if the payload is still invalid.

Repair broken JSON

Auto-fix trailing commas, comments, unquoted keys, and other common issues.

Learn formatting workflows

Compare browser, CLI, and in-code formatting methods for different use cases.

Use a sample API response

Test your formatting workflow with a realistic nested payload example.

Common formatter workflows

Copy a broken response from devtools

Format it first so the bad field, missing quote, or odd nesting becomes obvious.

Clean up JSON before sending it to a teammate

Readable payloads reduce back-and-forth when you need help debugging an integration.

Review production config or fixture changes

Stable formatting makes structural changes easier to spot during reviews and deployments.

Herramientas relacionadas

Validador JSON

Valida JSON con mensajes de error detallados y números de línea

Minificador JSON

Comprime JSON eliminando espacios y formato

Visor JSON

Explora JSON con vistas de árbol, tabla y texto

Reparador JSON

Corrige errores comunes: comas finales, comillas, etc.

Preguntas frecuentes

Pega tu JSON en el editor y haz clic en Format. Puedes elegir sangría de 2 espacios, 4 espacios o tabulaciones. La herramienta funciona 100% en tu navegador: no se envía nada a ningún servidor.

Primero verifica que el JSON sea válido. Los fallos más comunes son: llaves o corchetes de cierre faltantes, comas finales (trailing commas), claves sin comillas o usar comillas simples en lugar de comillas dobles. Si quieres, prueba nuestra herramienta JSON Repair para corregir automáticamente estos problemas.

Sí. Después de formatear, usa la opción Sort Keys para ordenar alfabéticamente todas las claves en todo el documento, incluidos los objetos anidados.

Sí. JSONTech procesa todo localmente en tu navegador con JavaScript. Los datos no se transmiten a ningún servidor. Si quieres comprobarlo, revisa la pestaña Network de las DevTools del navegador.

No hay diferencia: es lo mismo. JSON Formatter, JSON Beautifier y JSON Pretty Printer se refieren a aplicar sangría y saltos de línea para que un JSON minificado sea legible.