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JSON Pretty Print Formatter

Format messy JSON into readable, indented output. You can also validate, minify, and (optionally) sort object keys. Everything runs in your browser—no uploads.

Category: Data · URL: /tools/json-pretty-print-formatter.html
Tip: Strict JSON only (no comments, trailing commas, or single-quoted strings).
Related tools:
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Paste your JSON, pick options, then format it.

  1. Paste JSON into the input box.
  2. Select indentation (2 spaces, 4 spaces, or tabs) and enable Sort keys if needed.
  3. Click Pretty Print, Minify, or Validate.
  4. Use Copy Output to copy results, or Reset to clear everything.
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Secondary intents covered: Beautify a minified JSON blob for readability, Validate JSON and pinpoint parsing errors, Minify JSON to reduce payload size, Sort object keys to create stable diffs, Reformat JSON with a specific indentation level, Copy formatted JSON to clipboard quickly, Clean up JSON before pasting into code/config, Check whether a pasted response body is valid JSON

FAQ

Does this JSON formatter upload my data?

No. Formatting and validation run entirely in your browser.

Why does it say my JSON is invalid when JavaScript accepts it?

This tool uses strict JSON parsing: no comments, trailing commas, or single-quoted strings.

Can I minify JSON here?

Yes—click Minify to output compact JSON with no extra whitespace.

What does “Sort keys” do?

It alphabetically sorts keys in JSON objects (recursively) to make diffs more stable; array order is unchanged.

Can I choose tabs or spaces for indentation?

Yes. Pick 2 spaces, 4 spaces, or tabs from the indent selector.

Why is the output empty after clicking Pretty Print?

If parsing fails, output is cleared and the error message appears below.

Will it preserve number formatting and key order?

Numbers remain numbers; object key order may change if you enable Sort keys.