JSON Flattener
Flatten nested JSON into a single level of dot-notation keys.
Runs locally · Nothing uploaded
Nested JSON
Flattened JSON
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About JSON Flattener
Converts nested objects and arrays into a flat object whose keys use dot and bracket notation, e.g. "user.address.city" or "items[0].id". This makes deep structures easy to diff, put in spreadsheets, or map to environment variables. Pair with the unflattener to reverse the process.
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