JSON Formatter

Format, validate, and minify JSON payloads.

Formatted JSON

Enter valid JSON above to see formatted output.

What is JSON Formatter?

A JSON formatter validates and pretty-prints JSON payloads so API and config errors are easier to spot during development and incident response.

How it works

Paste JSON, format or minify, and fix syntax errors called out by the validator — entirely client-side.

Common issues

  • Trailing commas

    Standard JSON disallows trailing commas. Remove them or convert from JSONC-style snippets before validating.

Frequently asked questions

Does PacketWizard upload my JSON?

No. Formatting runs in your browser. Avoid pasting secrets into any shared screen recordings.

Related tools

Continue with these related PacketWizard tools for adjacent diagnostics.

YAML FormatterFormat, validate, and convert YAML configuration files.XML FormatterFormat, validate, and minify XML documents.Base64 Encode/DecodeEncode or decode Base64 strings.JWT InspectorDecode, inspect, and verify JSON Web Tokens with claim analysis and signature validation.