JSON Formatter & Validator

Format, validate, and minify JSON without leaving the browser. Drop API responses or config files in the editor to normalize indentation, catch malformed contracts, and copy clean payloads for docs.

Quick samples

Input JSON

Paste a JSON object or array, pick the output mode, and run the formatter.

Paste JSON, then format it with the indentation or compact output you need.

Formatted output

Copy the normalized payload and review its structural summary.

Ready when you are

Paste JSON into the editor and submit to validate or reformat it.

Documentation

JSON Formatter & Validator

Full Docs

About this tool

JSON Formatter validates, pretty-prints, and minifies JSON payloads. Use it when API responses, config snippets, or copied data need to be cleaned up before review or sharing.

Modes

Pretty-print mode adds indentation and line breaks while keeping the same structure. Minify mode removes unnecessary whitespace to produce compact JSON.

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Gotchas

The tool accepts JSON objects and arrays. Invalid syntax must be fixed before formatting can succeed. Trailing commas, comments, unquoted keys, and mixed non-JSON text will fail validation.

Formatting does not change field order, values, or structure intentionally.

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Key use cases

  • -Format JSON so it is easier to read.
  • -Minify JSON into a compact one-line value.
  • -Validate copied payloads before using them.
  • -Check payload stats before handoff.

FAQ