JSON Formatter

JSON Formatter validates, formats, and minifies JSON data. Paste raw JSON to check for syntax errors, auto-indent it with configurable indent size, or compress it to a single line for API requests.

Common JSON errors like trailing commas, single quotes instead of double quotes, and missing brackets are detected and highlighted. The formatter preserves key order and handles Unicode characters correctly.

Minified JSON is significantly smaller than formatted JSON, useful for reducing payload size in API responses or localStorage data. All processing runs in the browser using JSON.parse() and JSON.stringify().