DocomintFormatador e validador de JSON
Formate, valide e embeleze JSON instantaneamente no seu navegador.
What is a Formatador e validador de JSON?
Minified or inconsistently-indented JSON — the kind that comes back from an API response or a build log — is hard to scan by eye. This reformats it with consistent indentation and validates the syntax at the same time, catching a trailing comma or unescaped quote before it breaks whatever consumes the JSON next.
How to use the Formatador e validador de JSON
- Paste your JSON
- It's validated and formatted instantly, on your device
- Copy the result — nothing was sent anywhere
Example
Pasting {"user":{"id":1,"active":true},"tags":["a","b"]} formats it across multiple indented lines with each key on its own line, and flags an error immediately if a closing brace is missing.
Frequently asked questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data format used to represent structured data — commonly used by web APIs.
Is my data uploaded anywhere?
No — Formatador e validador de JSON runs entirely in your browser using JavaScript/WebAssembly. Your data is never sent to a server.
Is there a file size limit?
Free use covers files up to 50MB per file; signing up for Pro raises that to 200MB.
Does formatting also sort object keys alphabetically?
No — key order is preserved exactly as written. JSON object key order isn't semantically meaningful per the spec, but this tool doesn't reorder it in case the order matters to whatever reads the output next.
What kind of errors does the validator actually catch?
Standard JSON syntax errors — a trailing comma, an unescaped quote inside a string, a missing bracket — reported with the line and column where parsing failed, the same way a strict JSON.parse() would.