JSON Formatter & Validator
Pretty-print, minify, or validate JSON with live feedback.
About this tool
Clean up API responses, config files, and log snippets. Format with indentation, compress to one line, or check whether a string is valid JSON.
What you get
- Pretty-printed JSON with 2-space indent
- Minified single-line JSON
- Validation verdict and parse errors
- Line and byte count for formatted output
- One-click copy of pretty or minified result
- Unicode and escape sequences preserved on format
How to use
Pick Pretty, Minify, or Validate, paste JSON, and copy the formatted output or read the validation result.
Example
Paste minified API responses or config fragments to validate syntax and inspect structure.
Input
{"name":"ILSERBY","tools":["dns","ssl"],"online":true}
Output
{
"name": "ILSERBY",
"tools": [
"dns",
"ssl"
],
"online": true
}
Related searches
- json formatter
- json prettify
- json validator
- json minify
FAQ
How to pretty print JSON online?
Select Pretty mode, paste minified or messy JSON, and copy indented output with consistent 2-space formatting.
How to validate JSON syntax online?
Choose Validate and paste your text. You get pass/fail plus the exact line or token where parsing fails.
How to minify JSON to one line?
Use Minify mode to strip whitespace and newlines, producing a compact single-line string for logs or APIs.
How to fix invalid JSON errors?
Run Validate first to locate trailing commas, unquoted keys, or mismatched brackets, fix the snippet, then format again.
How to find the line number of a JSON syntax error?
Run Validate mode—the parser error points to the approximate position so you can fix trailing commas or missing quotes quickly.
By using this tool you agree to our Terms of Use and Privacy Policy. Results are provided as-is without warranty.