How to Convert JSON to CSV Online in Your Browser

To convert JSON to CSV online, paste a JSON array of objects into a JSON-to-CSV converter, choose a delimiter, and click Convert — the tool builds a header row from every key across your objects and escapes any field with commas or quotes so the file opens cleanly in Excel or Google Sheets. No server upload, no scripting, no formula surprises. Here is the full walkthrough.

What the converter produces

Given an array of objects, the tool flattens it into a table. It scans every object to build one complete header row from the union of all keys, then writes one data row per object. Fields containing a comma, double quote or line break are wrapped in quotes and internal quotes are doubled, following the CSV rules Excel and Sheets expect. The output is a ready-to-open .csv you can copy or download.

Step by step

1. Prepare your JSON as an array of objects, for example [{"name":"Ada","role":"eng"},{"name":"Grace","role":"eng"}]. You can also drop a .json file.
2. Choose your delimiter — comma for standard CSV, semicolon for locales where the comma is a decimal separator, or tab for TSV.
3. Click Convert to CSV. The tool builds the header row and every data row in one pass.
4. Review the output in the result box to confirm the columns look right.
5. Copy it or download the .csv and open it directly in your spreadsheet app.

How tricky data is handled

Because missing keys become empty cells rather than shifting neighbouring values, every row lines up under the correct column — the failure mode that breaks naive conversions is handled for you.

Why converting in the browser matters

The whole conversion runs locally in your browser with JavaScript, and your JSON is never uploaded to a server. That is exactly what you want for the data people most often need to convert: API responses, database dumps, exported user records. All of it stays on your machine. As an installed PWA the converter also works offline, so you can turn a JSON export into a spreadsheet on a plane or a locked-down laptop with no connection at all.

Try the JSON to CSV Converter — free and 100% in your browser.

FAQ

What format does my JSON need to be in?

An array of objects works best, since each object becomes a row and each key a column. A single object is also accepted and becomes a one-row table. If your data is wrapped in an outer property, extract the array first.

Which delimiter should I choose?

Use a comma for standard CSV. Choose a semicolon if your spreadsheet locale uses the comma as a decimal separator, or a tab if a downstream system expects TSV. All three produce correctly escaped output.

Will the file open correctly in Excel?

Yes. The converter follows standard CSV escaping — quoting fields that contain commas, quotes or newlines and doubling internal quotes — which is exactly what Excel and Google Sheets parse cleanly.

What happens to nested objects in my data?

Nested objects and arrays are written into their cell as a compact JSON string rather than exploded into extra columns. This keeps every record intact in a single, predictable column so the table structure stays stable.

Related free tools

• CSV to JSON Converter — convert the other direction.
• CSV Viewer & Table — preview the result as a table.
• CSV Cleaner & Deduplicator — tidy the output before use.
• JSON Formatter — tidy your JSON before converting.

Built by ByteVancer

ByteTools is a free product of ByteVancer, a software and web development studio building web apps, SaaS and custom software. When a one-off conversion becomes a recurring data pipeline, explore how ByteVancer can automate it for you.