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JSON Formatter & Validator

Input JSON

Size: 0.06 KBObjects: 2Arrays: 0Keys: 4

JSON Schema (Optional)

Formatted JSON

{
  "example": "Hello, World!",
  "isValid": true,
  "nested": {
    "a": 1
  }
}
TL;DR — format, validate, and export JSON in your browser

Paste or upload JSON, pick an indent, choose Beautify or Minify, toggle Sort keys for stable diffs, validate against a JSON Schema, then copy or download. Everything runs client‑side — no uploads.

JSON Formatter & Validator — clean, dependable output for everyday work

When you’re debugging an API response, reviewing a pull request, or getting a payload ready for documentation, you don’t want to wrestle with a heavyweight IDE just to make the JSON readable. This JSON formatter runs entirely in your browser and focuses on the things you do a hundred times a week: pretty‑print for clarity, minify for transport, and validate against a JSON Schema when correctness matters. Paste your JSON or upload a file, choose an indent (2 or 4 spaces), and you’ll see a clean, readable structure immediately. No sign‑ups, no uploads, and no waiting — it’s fast on modest laptops and works great on the go.

For teams that care about clean diffs, the tool includes a Sort keys option. It recursively orders object keys so the output is deterministic. That means smaller, more focused diffs in Git and code review; changes reflect real edits, not incidental reordering. Pair that with a fixed indent and you’ll eliminate the noise that slows code reviews down. If you need a compact file for production or network testing, switch to Minify and the tool will remove whitespace while preserving the exact data.

Validation is built in, so you can catch mistakes before they ship. Paste a JSON Schemato validate as you type, or disable live checks and validate on demand when you’re ready. If you don’t have a schema handy, click Generate Schema to create a sensible starting point from your current JSON; then refine it to your needs. A small stats panel shows you object and array counts, total keys, and the byte size of the minified payload — a practical way to keep an eye on growth over time.

This page also plays nicely with the rest of your workflow. Need to compare two versions of a payload? Open the Difference Checker for a line‑by‑line diff. Converting data for a spreadsheet or ingesting CSV exports? Use CSV to JSON and JSON to CSV. If you’re prepping text before formatting, the Advanced Text Cleaner can normalize whitespace and stray characters, and the Regex Tester helps you craft patterns for quick find‑and‑replace.

Everything runs locally — no data leaves your device. That makes this formatter suitable for sensitive payloads, internal API responses, logs, and configuration files you can’t upload elsewhere. It’s a straightforward, dependable utility built to save you time without adding friction to your day.

Key features

  • Beautify or minify JSON instantly with 2‑ or 4‑space indent
  • Recursive Sort keys for deterministic output and clean diffs
  • Live JSON validation against JSON Schema (or validate on demand)
  • Generate a starter JSON Schema from sample data
  • Size and structure stats (objects, arrays, keys, minified bytes)
  • Upload .json/.txt, paste from clipboard, copy or export
  • 100% client‑side — nothing is uploaded

Tips

  • Turn on Sort keys before committing to keep PR diffs easy to scan.
  • Minify for production payloads and network tests; Beautify for logs and reviews.
  • If validation gets noisy, disable validate‑while‑typing and validate on demand.
  • Use a fixed indent (2 or 4) across your team to avoid churn in diffs.

Frequently asked questions

Is my JSON uploaded anywhere?
No. Everything happens in your browser — safe for private payloads.
Beautify vs. Minify — what should I use?
Beautify adds indentation for readability; Minify strips whitespace for smaller, faster payloads.
Can I validate against a JSON Schema?
Yes. Paste a schema to validate live or on demand. You can also Generate Schema from your current JSON and refine it.
How do I make diffs stable for code review?
Enable Sort keys and stick to a fixed indent. That keeps diffs focused on real changes, not key order.

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