Excel → JSON Converter

Drag and drop your .xlsx, .xls, or .csv file to get instant JSON output — preview it as a table, copy it, or download it.

Runs 100% in your browser — your file is never uploaded to a server.
Drop your file here or click to choose
Supported formats: .xlsx, .xls, .csv

            

            

              

            

          

        


      

    


    

      
What Is an Excel → JSON Converter Useful For?

      
This tool converts the tabular data in an Excel (.xlsx/.xls) or CSV file into structured JSON that web applications and APIs can use directly. The conversion is done with the SheetJS library running in your browser: the first row of your file is treated as the column header and becomes the JSON field names (keys), and every following row becomes a separate JSON object — so the idea of a "table" becomes an array where each row is a record (object).

      
The most common uses: converting an accounting, inventory, or customer list to JSON before importing it into a web app or API; turning a product catalog kept in Excel into a data source for a static site generator; or a developer quickly generating structured test/sample data from a real spreadsheet. Using this tool instead of manually retyping raw Excel data saves time and reduces the risk of typos — especially when manually converting a list of hundreds of rows to JSON is simply impractical.

      
If your file has more than one tab (sheet), pick the one you want from the "Sheet" menu and convert each separately; empty cells are written as <code>null</code> in the JSON so your data structure stays intact. The Table Preview tab lets you check how the converted JSON looks as rows and columns — handy for spotting a misaligned column in a large file. The result can be copied to your clipboard in either indentation style (pretty-printed or single line), or downloaded directly as a <code>.json</code> file.

      
Privacy: if you're hesitant to upload an Excel file containing corporate or personal information, you can relax — your file is never sent to a server; parsing happens entirely in your browser's memory. This matters especially when handling sensitive corporate data like payroll, customer lists, or financial spreadsheets — you don't take on the risk you'd normally accept when uploading a file to an "online converter".

    


    
Try This Next
Finished here? These might be your next step.
JSON → ExcelConvert your JSON data into an .xlsx or CSV file.CSV ↔ ExcelCSV ↔ Excel conversion without character or delimiter problems.Excel → SQLGenerate ready CREATE TABLE + INSERT statements from your table.Excel → Markdown / HTMLConvert a table into a Markdown or HTML table.

      
Frequently Asked Questions

      
No. The conversion happens entirely inside your browser; your file never goes out over the internet. You can safely use it for private and sensitive data too.
The first row of your table is treated as the column header and becomes the JSON field names. Empty cells are written as null, so your data structure stays intact.
Yes. After uploading the file, pick any sheet from the "Sheet" menu and convert each one to JSON separately.
Both the modern (.xlsx) and legacy (.xls) Excel formats are supported, along with comma-separated value files (.csv). You can drag and drop your file or click to choose it.
Files with a few thousand rows are processed without issue in a modern browser. With very large files (tens of thousands of rows), parsing — and especially the Table Preview tab — may slow down a bit; in that case, downloading the JSON output directly without ever opening Table Preview is faster.
Numeric cells are written as numbers in the JSON, and text cells as strings. Date cells can vary depending on Excel's internal formatting; if a date column doesn't look the way you expect, try converting that Excel cell to Text format first and re-converting.
Last updated: