JSON Viewer
Explore JSON as a collapsible tree with types and item counts. Large documents open level by level, so they stay fast.
Free · No upload · 100% on your device
How to use JSON Viewer
- Type or paste your code or data, or open a file.
- The result updates as you type.
- Copy the result or download it as a file.
Private by design. Everything you type, open or record is processed in this browser tab and is never uploaded to KittySuite.
About JSON Viewer
Each branch shows how many items it holds. Branches are drawn only when you open them, so very large JSON files stay responsive; long arrays show the first 500 items per level.
Everything runs in this browser tab: your text is never uploaded or stored, and the result updates as you type. It keeps working offline once the page has loaded.
JSON Viewer: frequently asked questions
How do I explore a large JSON file?
Paste it or open the file. It appears as a tree with types and item counts, and branches open when you click them.
Will a very large file freeze the page?
No. Branches are drawn only when opened, and long arrays show the first 500 items per level.
Can I see arrays as a table?
Use JSON Studio, which shows arrays of objects as a table.
Is my JSON uploaded?
No. It is processed in this browser tab and never uploaded, which matters for API responses, logs and exports that contain private data.