Free online JSON formatter and validator. Paste JSON to format, minify, and validate it instantly. The tool pretty-prints with clean indentation and surfaces the exact error when something is off. Everything runs in your browser.
Format re-serializes JSON with two-space indentation for readability. Minify collapses it to a compact line. Validation parses with the browser engine and reports the precise error position on invalid input.
Nothing you paste is uploaded or stored, so it is safe for sensitive payloads and works offline.