JSON to CSV or JSON to Excel: Which Should You Use?

Two good ways to get JSON into a spreadsheet

When you have a JSON file and want it in a spreadsheet, you have two solid options: convert to CSV, or convert to Excel (XLSX). They are not the same, and the right choice depends on your data. This guide explains the trade-off and how nesting works in both.

How both handle nested JSON

Both conversions flatten nested objects the same way, using dot notation. An object like:

{ "id": 1, "user": { "name": "Asha", "city": "Jalaun" } }

becomes three columns: id, user.name, user.city. This works to any depth. Arrays of simple values (like ["a","b"]) are joined into a single cell. Arrays of objects are written as JSON text in the cell so nothing is lost. So the table shape is identical whether you choose CSV or Excel; the difference is in the file format and how values are stored.

When to choose JSON to CSV

CSV is the universal tabular format. Every spreadsheet app, database, and BI tool imports it. Pick CSV when:

You need to import the data into another system (a database, a CRM, an analytics tool).

The file needs to be small and portable.

Your values are plain text and numbers that will not be misread.

One caution: CSV is just text, so it carries no formatting. If you open a CSV directly in Excel, Excel may reformat values on the way in (stripping leading zeros, turning long numbers into scientific notation, reading "1-2" as a date). That is a property of opening CSV in Excel, not of the CSV itself.

When to choose JSON to Excel

Choose XLSX when your data contains values that Excel would otherwise mangle:

IDs with leading zeros (ZIP codes, product codes, account numbers).

Numbers longer than 15 digits (Discord snowflakes, tracking numbers, UPCs).

Strings that look like dates but are not (version numbers, gene names).

International phone numbers that begin with a plus sign.

SheetBeam writes those as text-typed cells in the Excel file, so they display exactly as they appear in the JSON, no rounding and no auto-conversion. If your data has any of these, XLSX is the safer choice.

A simple rule

If you are handing the data to another program, use CSV. If a human will open it in Excel and the data has IDs, codes, or odd-looking values, use XLSX so nothing gets reformatted. When in doubt, XLSX is the more forgiving option.

Convert either way

SheetBeam offers both, and the preview is identical, so you can decide after you see the table. Try JSON to CSV or JSON to Excel. Going the other direction? CSV to JSON turns a spreadsheet export back into a clean array of objects.