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YAML to XLSX

Convert YAML to XLSX free, in seconds. Paste your data below, press Convert, then copy the result and download a real spreadsheet file. Everything runs in your browser, so nothing is ever uploaded.

YAML input

Paste your YAML below, then press Convert.

Lists of maps convert best. Nested maps are flattened with dot notation.

XLSX output

Waiting for YAML input.

Private by design: parsing uses the js-yaml library (loaded once from a CDN); the conversion itself happens locally and your data is never uploaded. The spreadsheet library loads once from a CDN.
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How this conversion works

Paste YAML into the input box and press Convert (or just keep typing, conversion happens as you type). The tool parses it with the js-yaml library, then builds a genuine .xlsx workbook with the SheetJS library and offers it as a download. Parsing uses the js-yaml library (loaded once from a CDN); the conversion itself happens locally and your data is never uploaded.

About the spreadsheet

The SheetJS library builds a real .xlsx workbook entirely in your browser: one sheet named Sheet1, with your column names as the header row and one row per record. Press Download to save converted.xlsx, which opens in Excel, Google Sheets and LibreOffice. The sheet carries your data only, without styling or formulas, and handles thousands of rows comfortably.

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YAML to XLSX FAQs

Why convert YAML to XLSX?
XLSX is the format Excel, Google Sheets and LibreOffice open natively. Converting gives you a genuine spreadsheet file you can email, share and edit, which is far friendlier than raw data for non-technical colleagues.
How is my YAML parsed?
With the js-yaml library. A list of maps becomes one row per item, a single map becomes one row, and nested maps are flattened with dot notation so tabular output stays clean.
How is the file created?
The SheetJS library builds a real .xlsx workbook entirely in your browser: one sheet with your column names as the header row. Press Download to save converted.xlsx; no server is ever involved.
Are there formatting or size limits?
The sheet contains your data with a header row, without styling or formulas. It handles thousands of rows comfortably, though extremely large exports may take a few seconds to build.
Is my data sent to a server?
No. parsing uses the js-yaml library (loaded once from a CDN); the conversion itself happens locally and your data is never uploaded. The spreadsheet library loads once from a CDN, and your data never leaves your device.
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