Free JSON to CSV Converter Online
FJ Techtools provides a free JSON to CSV converter that works entirely in your browser. Paste your JSON data into the editor or upload a .json file, and the tool converts it to CSV automatically — no server upload, no signup, and no waiting. Download the result as a .csv file or copy it directly to your clipboard.
This is particularly useful when you have API response data in JSON format and need to open it in Excel or Google Sheets, share it with non-technical colleagues, or import it into a database or reporting tool that accepts CSV.
How to convert JSON to CSV online
Upload or paste
Click "Upload JSON file" to load a file from your device, or paste your JSON data directly into the input editor. The tool accepts both JSON arrays and objects.
Convert
The CSV output is generated automatically as you type or load data. Choose your preferred delimiter — comma, semicolon, or tab — from the separator dropdown.
Download or copy
Click Download to save the CSV file to your device with a custom filename, or click Copy to grab the output directly to your clipboard.
Supported input formats
The converter handles the two most common JSON structures:
- Array of objects — the most common API response format, where each object in the array becomes a row and each key becomes a column header. For example:
[{"name":"Alice","age":30},{"name":"Bob","age":25}] - Single object — a single JSON object where each key-value pair is converted to a row in the CSV output.
Nested objects and arrays within JSON may be flattened or serialized as strings depending on the structure. For complex nested JSON, consider using the JSON Beautifier first to inspect and understand your data structure.
Delimiter options
Three delimiter options are available to match the CSV format expected by your target application:
- Comma — the standard CSV format, compatible with Excel, Google Sheets, and most data tools.
- Semicolon — common in European locales where commas are used as decimal separators. Required by some versions of Excel in certain regions.
- Tab — produces a TSV (Tab-Separated Values) file, useful when your data contains commas and you want to avoid quoting issues.
Related data tools
- CSV to JSON Converter — reverse operation, convert CSV back to JSON
- JSON Beautifier — format and inspect JSON before converting
- JSON to String Converter — convert JSON to an escaped string