How do I use the JSON Formatter & Validator?

Format, validate, and minify JSON data online. Handles large payloads efficiently with syntax highlighting, error detection, and tree view — all processed locally in your browser. Simply enter your values and click calculate to get instant results.

Is the JSON Formatter & Validator free?

Yes, all calculators on AllCalculators.org are completely free to use with no registration required.

JSON Formatter & Validator

Paste JSON to format, validate, or minify — processed locally in your browser

Indentation

Input JSON

Output

About This Tool

Format — Pretty-prints JSON with your chosen indentation for readability.
Minify — Removes all whitespace to produce the smallest possible output.
Validate — Checks syntax and reports the exact error location with structure stats.
Local Processing — Your data never leaves the browser. Everything runs on your device.
Large Payloads — Efficiently handles JSON files up to several megabytes.