JSON Visualizer
Visualize JSON data as an interactive node graph
Paste JSON on the left to visualize it
Reading JSON as a graph instead of a wall of braces
JSON nests: objects inside objects, arrays of objects, references buried several layers down. Past three or four levels, holding that shape in your head gets tiring. The tool lays the structure out as a graph with a Dagre layout and a custom renderer, turning each object into a node and each key into an edge you can pan and zoom.
Working with big structures
The graph handles a few thousand nodes without complaint. Past that the Dagre layout slows down, since its cost grows roughly with the square of the node count, so for an API response with tens of thousands of items, drill into a representative slice rather than rendering the whole thing. Invalid JSON stops at the parse step and shows the browser's own parse message, so fix the syntax it points at and paste the corrected text back.
Fullscreen and a crisp export
The fullscreen toggle hands the graph the whole viewport, the sane way to read a large structure. The PNG export rebuilds the visible graph as SVG, so text stays text right up to the moment it rasterizes and the output holds up when zoomed. Export a PNG when you want to show a structure in documentation or a chat without sharing the raw file, though note the image still displays keys and truncated values.