Convert Excel to JSON
or click to upload
XLSX / XLS / ODS
Convert Excel spreadsheets into clean JSON for APIs, apps and scripts. The first row becomes the keys, and the file never leaves your browser.
- No watermarks
- Fast conversion
- 100 % in-browser
- Zero sign-up
How It Works
Convert Excel to JSON in three quick steps.
Upload Excel files
Drag and drop Excel files or browse your device. You can add several at once.
Convert to JSON
Your browser converts every file locally, so nothing is uploaded.
Download JSON
Save your JSON file, or a ZIP when you converted several files.
What is a Excel to JSON converter?
JSON is the format web apps and APIs expect, while data is often kept in Excel. An Excel to JSON converter reads each worksheet and writes the rows as JSON objects, using your column headings as property names, so you can feed spreadsheet data straight into code without a manual export step.
Give every column a unique, non-empty heading before converting. Duplicate headings are renamed automatically, which can make keys harder to use.
Header row becomes the keys
Each row turns into an object such as {"name": "Anna", "age": 31}, using the first row as property names.
One sheet or many
A single worksheet is exported as an array. A workbook with several sheets is exported as an object with one array per sheet name.
Real data types
Numbers stay numbers, booleans stay booleans and dates are written as ISO 8601 text. Empty cells become null.
Formula results, not formulas
Cells that contain formulas are exported using their last calculated value.
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Simple Excel to JSON Conversion
A fast, private way to turn Excel files into JSON.
Quick Conversion
Convert Excel to JSON in seconds. Everything is processed on your device, so there is no upload wait.
Private by Design
Your files never leave your browser. Nothing is uploaded to a server and nothing is stored.
Works Everywhere
Use it on desktop, tablet or phone. There is no software to install and no extension needed.
Completely Free
No account, no watermark and no limit on how many files you convert.
Frequently Asked Questions
Common questions about Excel to JSON conversion.
Upload your spreadsheet, press Convert and download the .json file. Several files are delivered together as a ZIP.
XLSX, XLSM, XLS and ODS files are supported.
A workbook with more than one sheet becomes one JSON object whose keys are the sheet names and whose values are arrays of rows.
Dates become ISO 8601 text (for example 2025-03-01T00:00:00.000Z) and empty cells become null.
It exports the value Excel last calculated and saved. A file that was never calculated and saved by Excel may show empty values.
No. It is read and converted locally in your browser.
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