JSON Flattener
Flatten nested JSON objects into dot-notation key-value pairs. Unwrap complex hierarchies for tabular processing. Dot-notation paths preserve nesting info for spreadsheets and logs — local processing, free, no signup.
How to Use the JSON Flattener
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Frequently Asked Questions
What does JSON flattening do?
It converts nested JSON objects into a flat key-value structure using dot notation. For example, {a: {b: 1}} becomes {'a.b': 1}. This makes nested data suitable for CSV export and database imports.
How are arrays handled?
Arrays can be flattened with indexed keys (items.0, items.1) or with bracket notation (items[0]). Choose the style that matches your downstream processing requirements.
When using JSON Flattener, what are common use cases?
Exporting nested API responses to CSV, importing JSON into flat databases, transforming data for spreadsheet analysis, and preparing data for tools that require tabular input.
Is there a depth limit?
No hard limit. Deeply nested structures (10+ levels) are flattened correctly, though very deep hierarchies may produce long key names that are harder to read.
Is my JSON data stored or transmitted?
No. All flattening happens locally in your browser. No JSON data is sent to any server.
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Last updated October 2026