🗂️ JSON Formatter

Prettify, minify, and validate JSON instantly in your browser.

About JSON Formatter

Paste JSON to get a properly indented, syntax-highlighted version. Switch between formatted and minified output, search through the result, and explore deeply nested structures with the collapsible tree view.

How to use

  1. Paste JSON into the input panel.
  2. Choose Format for pretty-printed output or Minify for a single line.
  3. Browse the tree, collapse branches, or search for a specific key.
  4. Click the copy button to copy the output to your clipboard.

Common use cases

  • Reading API responses copied from the browser network tab or curl.
  • Cleaning up JSON pasted from logs or chat windows.
  • Quickly checking that a config file is valid JSON.
  • Inspecting deeply nested data without scrolling through a wall of braces.

Tips

  • Validation errors show the line and column so you can fix them in place.
  • Output is always strict JSON, safe to feed straight into another parser.
  • Everything runs locally — your JSON never leaves the browser.

FAQ

Is JSON Formatter free?
Yes. Every tool here runs entirely in your browser — no accounts, no quotas, no rate limits.
Does my JSON ever leave my computer?
No. The page is a single static HTML file; all parsing and formatting happen locally in your browser.
What's the difference between Format and Minify?
Format pretty-prints with two-space indentation for readability. Minify strips whitespace and newlines so the output is the smallest valid JSON.
Can I search through formatted output?
Yes. Press Ctrl/Cmd+F to open an inline search that highlights matches across keys and values, even inside the collapsible tree view.

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