JSON is how apps talk to each other, but a spreadsheet is where people actually read data. This free JSON to CSV converter bridges that gap: paste JSON or drop in a .json file and it turns arrays of objects into clean comma-separated rows you can open in Excel, Google Sheets or LibreOffice. Nested values stay safe as JSON text inside their cells, and you see a preview with row and column counts before downloading. The conversion happens locally in the browser, nothing is uploaded, so private data never leaves your device at all.
How this JSON to CSV converter works
The converter reads your JSON with the browser’s built-in parser, flattens each object into one spreadsheet row, and builds the CSV with the SheetJS library. Keys become column headings, values become cells, and any object or array found inside a cell is written out as JSON text so nothing is silently lost. The whole conversion happens locally in the browser, nothing is uploaded to a server, which means API responses, customer exports and log extracts stay on your own machine from start to finish.
How to use it
Paste your JSON into the box, or use the file picker — or simply drag a .json file onto the drop area — and press Convert to CSV. The tool shows the number of rows and columns plus a preview of the first eight lines, so you can check headings and quoting before anything is saved. Happy with what you see? Press Download .csv. If you loaded a file called orders.json, the download keeps that name as orders.csv; pasted JSON is saved as data.csv.
Which JSON shapes are supported
Three shapes cover almost everything you will meet in practice. A top-level array of objects — the classic API response — becomes one row per object, with a heading row built from every key found across the objects. A single object becomes a single row under its own headings, handy for settings files and one-off records. An array of plain values, such as numbers or strings, becomes a tidy one-column list headed “value”. Anything else is wrapped the same simple way rather than being rejected.
Nested objects, commas and quotes
Real JSON is rarely flat, and flat CSV has opinions. When a cell itself contains an object or a list, the converter writes it as compact JSON text inside that cell, so a second tool can parse it back later. Values containing commas, double quotes or line breaks are wrapped in quotes and their inner quotes are doubled, exactly as the CSV standard requires — that is why a name like Ada, Lovelace or a note containing “hello” survives the trip into Excel without splitting into phantom columns.
Why convert JSON to CSV at all?
Because CSV is the universal hand-off format. Finance teams, marketers and support staff who would never open a JSON file will happily open a spreadsheet, sort it, filter it and chart it. CSV also imports cleanly into databases, statistics tools and mailing platforms, and it archives well: a plain-text table from ten years ago still opens today. Converting at the point of need — quickly, privately and without installing anything — keeps JSON as the machine format and CSV as the human one.
Limitations worth knowing
CSV is flat by design, so deeply nested data will always lose some structure; the JSON text kept in cells softens that, but a truly hierarchical export may belong in a database instead. Objects in the same array that use very different keys produce wide tables with empty cells where a key was missing. And very large files — tens of megabytes of JSON — can make any browser tab work hard, because everything is parsed and held in memory on your device.
JSON to CSV Converter – frequently asked questions
Is this JSON to CSV converter free?
Yes. It is completely free, needs no sign-up, and you can convert as many files as you like.
Is my JSON uploaded anywhere?
No. The conversion happens locally in the browser, nothing is uploaded, and your data never leaves your device.
What happens to nested objects and arrays?
They are written as JSON text inside their cell, so the information is preserved and can be parsed again later by another tool.
Why does my CSV have a column called “value”?
That happens when the JSON is a simple list of values rather than objects. The converter places each value in its own row under that single heading.
Related tools
Versión en español: Convertir JSON a CSV gratis – Exporta tus datos a una hoja de cálculo. You may also like: CSV to XLSX Converter – Turn CSV Files into Excel Workbooks Free · JSON to YAML Converter – Clean YAML for Config Files.
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