JSON to CSV & CSV to JSON Converter
Convert structured JSON data arrays to spreadsheets or parse CSV documents back to JSON format instantly and locally.
JSON Array Input
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CSV Output
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Frequently Asked Questions
What data schemas are supported?
For JSON inputs, a flat or nested JSON array of objects is supported. For CSV inputs, any standard comma-separated, semicolon-separated, or tab-separated records with an optional header row will parse successfully.
Is there a file size limit?
No hard limits are enforced since operations occur client-side. However, files exceeding 5MB might cause temporary UI freeze depending on the client CPU performance.
Does it preserve data types during conversion?
Yes, when parsing CSV to JSON, numbers (integers, floats) and boolean values (true, false) are automatically recognized and converted to their correct types instead of leaving them all as strings.
How does nested JSON flattening work?
If an object contains nested sub-objects (e.g.
{"user": {"name": "Alice"}}), the converter flattens the hierarchy using dot-notation: user.name, mapping nested items cleanly into tabular CSV headers.