🧾 JSON to CSV Converter
Paste a JSON array of objects and get clean CSV output instantly. Free browser-based JSON to CSV converter — no upload, works offline.
Working with APIs, configuration files, or exports that come as JSON, but need the data in a CSV table? Our JSON to CSV Converter turns a JSON array of objects into clean, well-formed CSV in one click — entirely in your browser, with nothing uploaded anywhere.
JSON is everywhere: REST API responses, webhook payloads, database exports, and settings dumps. But when you need to open that data in a spreadsheet, run it through a data-analysis tool, or import it into a CRM or email platform, CSV is usually the format those tools want. This converter bridges that gap: paste your JSON, get CSV with a header row built from the object keys and one row per object.
The tool flattens simple key-value objects into columns and automatically handles nested values by stringifying them, so you never lose data — a nested object or array simply becomes a compact JSON string inside its cell. Column order follows the first object that defines each key, which matches how most APIs structure their responses.
Typical uses include converting API output to a table for reporting, preparing JSON test data for spreadsheet review, moving user or product records between systems, and quickly inspecting large JSON payloads without writing a script. Because it runs locally, even sensitive payloads stay on your machine.
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What JSON format does this converter accept?
It accepts a JSON array of objects, like the output of most APIs: [{"name":"Alice","age":30},{"name":"Bob","age":25}]. The object keys become the CSV header row, and each object becomes one data row. A single JSON object or a nested array-only structure won't produce meaningful CSV.
How are nested objects and arrays handled?
Nested values are kept safe by converting them to a compact JSON string inside the cell (for example, an address object becomes {"city":"Amsterdam"}). This means no data is lost, and you can still see the full value in the spreadsheet cell before splitting it out if needed.
What happens if a row is missing some keys?
Missing keys become empty cells, and the column order stays consistent across all rows. The header is built from the first object that defines each key, matching how most APIs return their data, so the table stays aligned even when objects differ slightly.
Is my JSON data uploaded to a server?
No. Parsing and conversion run entirely in your browser with JavaScript — nothing is sent anywhere. This makes the tool safe for confidential API responses, customer records, or any data you don't want to share with a third-party service.