CSV/JSON to Excel Converter

Convert CSV or JSON to an Excel (.xlsx) spreadsheet online — free and instant download.

About

About the CSV/JSON to Excel Converter

Turns pasted CSV or a JSON array of objects into a real .xlsx spreadsheet file you can download and open in Excel, Google Sheets or any other spreadsheet program.

Analysts and support teams use it to turn a quick JSON export or copy-pasted CSV table into a spreadsheet without opening a spreadsheet program first, and developers use it to spot-check API output in a familiar grid format. It's one of many free data tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

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Guide

Using the CSV/JSON to Excel Converter

  1. 1

    Step 1

    Paste CSV text, or a JSON array of objects, into the Data box.

  2. 2

    Step 2

    Optionally change the Sheet name.

  3. 3

    Step 3

    Click "Download .xlsx" — the spreadsheet library loads from this site the first time you use this.

  4. 4

    Step 4

    Open the downloaded data.xlsx file in your spreadsheet program of choice.

  • Accepts either CSV text or a JSON array of objects, and detects which one you pasted
  • For JSON, automatically collects every distinct key across all objects into columns
  • Auto-detects the CSV delimiter, so comma- or tab-separated data both work
  • Lets you set a custom sheet name for the generated file
  • Produces a real, standard .xlsx file that opens in Excel, Google Sheets, and more
  • Runs entirely in your browser — your data is never uploaded to a server
  • Free to use, with no sign-up and no limit on how many times you run it

Analysts

Analysts use the CSV/JSON to Excel converter for turning a quick data export into a spreadsheet they can filter, sort and chart.

Support teams

Support teams use the CSV/JSON to Excel converter for turning a customer-provided data dump into a spreadsheet without writing any code.

Developers

Developers use the CSV/JSON to Excel converter for spot-checking an API response's data in a familiar grid layout.

Students

Students use the CSV/JSON to Excel converter for turning a dataset from a tutorial or assignment into a spreadsheet they can work with directly.

Examples

CSV/JSON to Excel Converter examples

2 worked examples

01

A pasted CSV table

Pasting a 3-column, 50-row CSV export produces a data.xlsx file with those exact rows and headers.

02

A JSON array of objects

Pasting [{"name":"Alice","age":30}, {"name":"Bob","age":25}] produces a spreadsheet with "name" and "age" columns.

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FAQ

Frequently asked questions

Quick answers to common questions about the CSV/JSON to Excel Converter.

What does the CSV/JSON to Excel converter do?

It converts pasted CSV text or a JSON array of objects into a downloadable .xlsx spreadsheet file.

Is the CSV/JSON to Excel converter free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my data uploaded anywhere?

No. The spreadsheet is generated entirely in your own browser after a small spreadsheet library loads from this site — your pasted data itself is never sent to a server.

Does this tool load anything extra?

Yes. The first time you click "Download .xlsx", it loads the open-source SheetJS (xlsx) library — served from this site, not a third-party CDN — to build the spreadsheet file in your browser.

How does it handle a JSON array with objects that have different keys?

It collects every distinct key it finds across all the objects and uses that combined set as the column headers, leaving a blank cell for any object missing a given key.

What delimiter does it expect for CSV input?

It auto-detects the delimiter, so both comma-separated and tab-separated pasted data are handled without you needing to specify which one you used.

What is the downloaded file named?

It downloads as data.xlsx, with the sheet inside named whatever you set in the Sheet name field (or Sheet1 by default).

Can I use this tool on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike, though downloading a file works best on a desktop browser.

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