Excel to JSON Converter for XLSX, XLS, and CSV Files
Use this Excel to JSON converter to turn .xlsx, .xls, and .csv spreadsheets into JSON with SheetJS. Upload a file, select a sheet, decide whether the first row is treated as a header, and choose an array of objects or an array of arrays. The conversion runs locally in your browser, so your file stays on your device.
The Excel to JSON converter turns .xlsx, .xls, and .csv files into JSON using SheetJS. Upload a spreadsheet, choose the sheet to work with, and select the output shape that suits your task. The tool is designed to make spreadsheet conversion straightforward without requiring a local installation.
You can toggle whether the first row is a header and choose between an array of objects and an array of arrays. These options let you control how the spreadsheet is represented in the resulting JSON. Review the output shape before copying the result so it matches the way you plan to use the data.
Excel workbooks can contain spreadsheet data organized into sheets, while CSV files represent tabular data as text. JSON represents data in a structured format that developers can use in many programming workflows. Converting a spreadsheet to JSON can make its rows easier to work with in code, and the available output shapes provide two ways to represent that tabular content.
The conversion runs entirely in your browser: the file stays on your device and is not sent to a server. The tool is free, and after the page has loaded, it works offline. This is useful when you want to convert spreadsheet data without uploading it or relying on an active connection.
Developers and DevOps engineers can use the tool for routine Excel to JSON tasks, CSV conversion, or preparing spreadsheet data for a project. Whether you are new to JSON or regularly handle structured data, the sheet picker, header-row toggle, and output-shape choices help you get a result suited to your needs.
Step 1: Upload an .xlsx, .xls, or .csv file to start converting your spreadsheet to JSON.
Step 2: Select the sheet you want to convert when working with a workbook.
Step 3: Toggle the header-row option to control whether the first row is treated as a header.
Step 4: Choose the output shape: an array of objects or an array of arrays.
Step 5: Review and copy the JSON result for use in your project.
Use case: Convert spreadsheet data to JSON for a development task without installing a converter locally.
Use case: Work on a spreadsheet conversion from whichever machine you have available, using the browser-based tool.
Use case: Convert internal or sensitive spreadsheet data without pasting it into a third-party service; processing stays in your browser.
Use case: Turn a CSV file into JSON when you need to work with tabular data in a JSON-based workflow.
Use case: Choose an array of objects when you want a record-oriented representation of spreadsheet rows.
Use case: Choose an array of arrays when you want the output to retain a simple row-and-column structure.