ProToolBox

JSON Formatter & Beautifier — Pretty-Print, Minify & Copy

Paste messy JSON on the left—get a clean, indented tree in milliseconds. Live stats, minify, and one-tap copy. Nothing leaves your browser.

Format and beautify JSON online

For API responses, webhooks, and config files—read nested data fast, then minify when you need one line.

1 Paste · 2 Indent · 3 Scan stats & output · 4 Copy or minify

Pretty output

Try or . Valid or invalid only? JSON validator.

Runs in this tab only—no server upload, no signup, no watermark.

Paste JSON to see output size, root shape, depth, and a key map when it applies.

What you will see: A large formatted panel plus character count, depth, and root shape. Next: use Copy output or Minify.

Your formatted JSON appears here.

Paste on the left or tap a sample—Live update refreshes as you type. Nothing is uploaded.

Next: Paste into your IDE, Slack, Postman, or docs. Turn off Live update for very large payloads if the tab slows down—then click Pretty-print when you are done. · All tools

  • Works in your browser—runs on your device, not our servers
  • No upload required—your input stays in this tab
  • Free and instant
  • No account needed
  • Private by default—the same ProToolbox promise on every page

What this is for

JSON Formatter & Beautifier — Pretty-Print, Minify & Copy helps you format, validate, and encode before paste: works in your browser, no account needed. JSON, YAML, Base64, URLs, escapes—check here first, then ship to PRs, Slack, or configs.

  • Re-validate after every payload edit
  • Copy from the panel—nothing leaves your device until you do
  • Local run for tokens and internal data
  • Green here, then paste into production paths

Security: Fast correctness pass only—secrets still go through your team’s review.

Why keep a JSON formatter handy

Logs and API bodies are often one long line. Pretty-printing saves time in review and debugging—locally, without shipping data to a server.

How it works

  1. Paste JSON (minified or messy).
  2. Set indent (2, 4, tab); use Pretty-print or leave Live update on.
  3. Scan the stats bar (size, shape, depth, keys) and the pretty output panel.
  4. Copy output or Minify for a single line.

FAQ

  • Does my JSON get uploaded? No—parsing and formatting run only in your browser.
  • Can I minify after formatting? Yes—Minify then Copy output.
  • Formatter vs validator? This page transforms text for readability; the JSON validator is for a quick valid/invalid check.

Bookmark this page for every sprint: APIs, CI logs, and config diffs are easier when JSON is one click away.

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