ToolOrbit
Developer Trending

JSON Formatter & Validator

Paste messy JSON and get clean, indented output instantly. ToolOrbit validates structure, points to the exact location of syntax errors, and lets you minify for production — all locally in your browser.

Examples

Input
{"name":"Ada","skills":["math","code"]}
Output
{
  "name": "Ada",
  "skills": [
    "math",
    "code"
  ]
}

How it works

The formatter hands your text to the browser’s own JSON parser. If it parses, the data is printed again with the indent you picked: 2 spaces, 4 spaces or a tab. If it does not, you get the parser’s error message and the approximate line where it stopped.

  • Keys is the total number of object keys at every level.
  • Depth is how many levels of objects and arrays are nested inside each other.
  • Minify prints the same data with all whitespace removed.

Only strict JSON is accepted, so comments, trailing commas and single-quoted strings are reported as errors. Whole numbers above 9,007,199,254,740,991 are rounded, because the browser reads every JSON number as a double.

How to use JSON Formatter & Validator

Paste your JSON
Drop your JSON into the input box, or type it directly.
Pick an action
Choose Beautify for readable output or Minify to compress it.
Fix any errors
If the JSON is invalid, we highlight the exact line and reason.
Copy the result
Use the Copy or Download button to grab your formatted JSON.

Why use this tool

Find syntax errors instantly with precise line numbers
Switch between 2-space, 4-space and tab indentation
Minify to shrink payloads for production
Everything runs locally — your data never leaves your device

Frequently asked questions

No. All parsing and formatting happens entirely in your browser. Nothing is sent or stored.

You can format with 2 spaces, 4 spaces, or tabs, and you can minify to a single line.

Yes — files up to several megabytes format instantly. Extremely large files may briefly pause the tab while parsing.

Found a bug or have an idea?

ToolOrbit is actively developed — feedback directly shapes what gets built next.

Send feedback