A JSON to CSV converter lets you turn API responses and data exports into spreadsheet-ready files - and convert CSV tables back to JSON - all without leaving your browser.
What is JSON to CSV Conversion?
JSON arrays are the standard output format for REST APIs, but most data analysts and stakeholders work in spreadsheets. Converting a JSON array (where each object is a row) into CSV gives you a format that Excel, Google Sheets, and almost every data tool can open directly.
CSV to JSON is equally useful: you may receive a CSV file from a client or colleague and need to feed it into a JavaScript application or a database import script that expects JSON.
How to Use the JSON to CSV Converter
- Open the JSON ↔ CSV Converter on UtilWave.
- To convert JSON to CSV: paste a JSON array (e.g.,
[{"name":"Alice","age":30},{"name":"Bob","age":25}]) into the input. - Click JSON → CSV and the tool generates a CSV with a header row and one row per object.
- To convert CSV to JSON: paste a CSV (with a header row) and click CSV → JSON to get the JSON array.
- Copy the result or download it as a file.
- Everything runs locally - no data is uploaded.
Common Use Cases
API response to spreadsheet - Export paginated API data as JSON, paste it in, and download a CSV to open in Excel or Google Sheets immediately.
Database seed files - Preparing test data in a spreadsheet is fast; convert it to JSON to feed into a seed script.
ETL pipelines - Quickly transform data between formats during exploratory data engineering without spinning up a script.
Client data exchange - Clients often deliver data as CSV; convert to JSON to load it into your app's data model.
Tips for Clean Conversion
- The JSON input must be an array of objects at the top level - not a single object or a nested structure.
- Nested objects are flattened with dot notation (e.g.,
address.city) in the CSV output. - Special characters like commas and quotes inside values are escaped automatically.
- Array values inside objects are serialized as JSON strings in the CSV cell.
FAQ
Can I convert multi-level nested JSON? Yes. Nested objects are flattened using dot notation so each property becomes its own column header.
Does the CSV need a header row? Yes - when converting CSV to JSON, the first row is always treated as the column names (header).
What delimiter does the CSV use? The standard comma delimiter is used by default, which is compatible with Excel, Google Sheets, and most data tools.
Is there a row limit? No hard limit - it depends on your browser's memory. Hundreds of thousands of rows work fine on modern devices.
Use the JSON to CSV Converter to switch between formats instantly.