YAML to XLSX Converter
Convert YAML into Microsoft Excel XLSX files with professional formatting. Paste a YAML list of mappings (or a single mapping) and get an Excel-ready spreadsheet.
Excel Options
Recommended Settings
Pro Tips
- •A single YAML mapping is treated as one row; a YAML list of mappings becomes multiple spreadsheet rows
- •If entries have different sets of keys, the spreadsheet includes the union of all columns found
- •Nested objects or arrays inside a value are serialized as JSON text within that cell
- •Auto-sized columns and frozen headers make the resulting spreadsheet easier to work with in Excel
- •The whole document is parsed locally in your browser using js-yaml - nothing is uploaded anywhere
Most Popular
Most users enable all options for a professional, Excel-ready spreadsheet
When to Use This Tool
Convert a YAML data file or config list into a formatted Excel spreadsheet for business reports or reviews.
Turn YAML-based data into an Excel file ready for pivot tables, charts, and formulas that aren't available directly on YAML.
Convert a YAML configuration list into a spreadsheet to review, sort, or filter settings visually before editing.
Share YAML-based data with colleagues or clients who prefer working in Excel rather than parsing raw YAML.
How It Works
Parse the YAML input using the js-yaml library, which fully supports the YAML spec including anchors and multi-line strings
Normalize the result into an array of records, computing the union of all keys to build the header row
Build an Excel worksheet from the resulting rows, applying auto-width, freeze pane, and header styling as selected
Generate a native XLSX file using the SheetJS library and trigger a download
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by js-yaml + SheetJS (xlsx) for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
What YAML structures does this tool support?
It accepts a single YAML mapping (converted to a one-row spreadsheet) or a YAML list of mappings (converted to a multi-row spreadsheet). Scalars or lists of scalars aren't supported since a spreadsheet needs field names.
Will the XLSX file open in Excel?
Yes. The tool generates a native Excel 2007+ XLSX file that opens in Microsoft Excel, Google Sheets, LibreOffice Calc, and other spreadsheet applications.
How are nested objects and arrays handled?
A nested object or array value is serialized as a compact JSON string within its cell, since spreadsheet cells can only hold flat text.
Is my YAML uploaded to a server?
No. The entire document is parsed locally in your browser using the js-yaml library, and the Excel file is generated locally too. Your data never leaves your device.
Can I add multiple sheets to the output file?
This tool creates a single-sheet Excel file. If you need multiple sheets, convert each YAML document separately and combine the sheets manually in Excel.