JSON Viewer & Formatter
Format, validate, minify, and inspect JSON in a tree viewer. Paste JSON or open a file and process it directly in your browser.
Use this free JSON viewer and formatter to clean, inspect, and validate JSON data entirely in your browser. Paste raw JSON or open a local file, then format with configurable indentation, sort keys, minify for transport, or explore the full tree view to trace nested paths. Validation errors are reported with line numbers and hints. No content is sent to any server — all processing runs client-side. Useful for developers debugging API responses, reviewing payloads, and preparing clean JSON for documentation.