JSON Formatter & Validator is a free browser-based tool that formats, validates, and minifies JSON instantly. It supports tree view, error highlighting, and auto-fixing common issues like single quotes. All processing happens locally in your browser — no data is ever sent to a server.
Beyond JSON formatting, the site offers 20+ additional tools: convert JSON to CSV, YAML, XML, TOML; format HTML, SQL, YAML, XML; decode JWT tokens; test regex; encode/decode Base64 and URLs etc.
