writeJSON

Save a MATLAB variable to a JSON file.
2 Downloads
Updated 2 Oct 2025

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A simple utility function to export any MATLAB variable to a JSON file.
Usage
% Example data
data.name = "Alice";
data.scores = [95, 87, 76];
% Write compact JSON
writejson(data, "data.json", false);
% Write pretty-printed JSON (MATLAB R2021a or newer)
writejson(data, "prettyData.json", true); % equal to writejson(data, "prettyData.json")
Will result in
{
"name": "Alice",
"scores": [
95,
87,
76
]
}

Cite As

Joshua Bauske (2026). writeJSON (https://uk.mathworks.com/matlabcentral/fileexchange/182190-writejson), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2025b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
1.0.0