JSON Viewer/Formatter
Input
Output
About the JSON Viewer
Raw JSON from APIs is often minified into a single unreadable line. A JSON viewer formats it with proper indentation, making the structure immediately visible — which fields exist, how deep the nesting goes, and where arrays start and end.
Paste any JSON to see it beautified instantly. The viewer handles large payloads, preserves unicode characters, and displays the formatted result with proper syntax highlighting — all computed locally.
How to use
- Paste your JSON into the input panel.
- The formatted output appears instantly.
- Use the output for debugging, documentation, or code review.
- Copy the beautified result with one click.
Frequently Asked Questions
Can this handle large JSON files? ▾
Yes — the viewer handles multi-megabyte JSON payloads. Very large files may take a moment to format but all processing happens locally.
Does it preserve unicode characters? ▾
Yes, unicode characters (emoji, non-Latin text) are preserved exactly as-is. No escaping or replacement occurs.
How do I explore a large JSON file without uploading it? ▾
Paste or load it — the viewer formats and renders a collapsible tree entirely in your browser, so multi-megabyte API dumps with sensitive fields never touch a server.
Can the viewer handle JSON with syntax errors? ▾
It reports the line and position of the first error instead of rendering, which doubles as a quick pre-check before jq or your pipeline sees the file.
Does formatting change my JSON data? ▾
No — pretty-printing only adds whitespace. Key order and values are preserved exactly as parsed.