JSON Viewer Editor — A Fast JSON Toolkit A fast, privacy-first JSON viewer and editor built for developers and data-focused users. View, edit, validate, and format JSON — completely offline. View & Edit JSON • Code editor with syntax highlighting • Collapsible tree view for easy navigation • Create new files or edit existing ones • Copy or share instantly Import JSON Easily • Paste from clipboard with instant validation • Load JSON from any URL or API endpoint • Built-in templates: API response, config, mock data • Start from scratch with empty files Powerful JSON Tools • Validate — detect syntax errors instantly • Format — beautify with clean indentation • Minify — compress JSON for production • Escape — escape or unescape strings Format Conversion • JSON ⇄ YAML • JSON ⇄ XML • Ideal for API testing and data transformation File Management • Save and organize multiple JSON files • Quickly search and reopen recent files Privacy First • No account required • No tracking or analytics • Works fully offline • Your data stays on your device Whether you’re debugging API responses, editing config files, or learning JSON, JSON Viewer Editor keeps your workflow fast and simple.