Paste JSON, YAML, or XML to format and validate. No data leaves your device.
About this tool
This formatter validates and prettifies JSON, YAML, and XML in your browser. It's helpful for debugging API responses, configuration files, and data interchange formats.
How to use
- Paste or type the content into the input area.
- Click Format & Validate to see a structured, readable output or error messages with details.
No content leaves your device while using this tool.
Examples
JSON input (compact):
{"name":"Alice","roles":["admin","user"],"active":true}
Formatted output:
{
"name": "Alice",
"roles": [
"admin",
"user"
],
"active": true
}
Use this tool to spot syntax errors and preview structured data before sending it to APIs or saving to files.