Network tools / JSON Formatter & Validator

JSON Formatter

Format, validate and minify JSON locally without changing large numbers or duplicate keys.

Processed in your browser. Input is not uploaded or saved by this tool.

About JSON formatting

Format or minify

Paste JSON, choose 2 or 4 spaces, and format it. Minify removes unnecessary whitespace. Strings, number spelling and duplicate object keys are preserved.

Strict JSON validation

Use double quotes and valid JSON values. Comments, trailing commas and JavaScript expressions are not JSON. Limits: 1,000,000 characters and 200 nesting levels.

Local processing

Formatting runs in your browser. JSON is not uploaded or saved by this tool. Review the result before using it in a production configuration.