JSON to Excel Converter
Turn a JSON API response or data export into a real Excel workbook without the data leaving your browser — free and with no account required. Nested objects are flattened into readable columns, and the preview shows the exact table you are about to download.
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JSON
JSON is the standard data-interchange format of the web. It stores structured, possibly nested records in human-readable text and is the native format of most modern APIs and configuration files.
Excel
XLSX is the default workbook format of Microsoft Excel. It stores typed cells, multiple sheets, and formatting in a compressed container, and is the lingua franca of business reporting and data exchange.
How the JSON to Excel conversion works
The converter accepts an array of objects or a single object. Nested structures are flattened to dot-notation column headers such as order.customer.name, so deeply structured API payloads become a flat, analyzable sheet. Arrays inside a record are stored as JSON text in their cell, and numbers and booleans are written as native Excel cell types.
The workbook is generated locally with a single Sheet1, and each column's width is derived from its longest content so the file opens legible. The Excel writer itself is loaded only when needed, which keeps this page light for everyone who lands on it.
Frequently asked questions
- How does nested JSON end up in a spreadsheet?
- Each nested path becomes one column with a dot-notation header — user.address.city, for example. Rows missing that path just leave the cell empty, so ragged data stays aligned.
- Will values arrive as text or as real Excel types?
- Real types: JSON numbers become numeric cells and booleans become TRUE/FALSE, so pivot tables and formulas work without cleanup.
- Can I choose the sheet name?
- The output always uses a single sheet named Sheet1 for predictability. Renaming a sheet in Excel afterwards is a double-click if you need something else.
- Is this really free and private?
- Yes on both counts. The conversion runs inside your browser tab — no upload, no server-side processing, no signup, and no watermarks.