Withdata DataFileConverter converts YAML (*.yaml, *.yml) files to Excel locally — single file, batch, or merge multiple YAML files into one Excel. Nested YAML mappings are flattened into dotted column names. 100% local, secure, and cross-platform.

YAML is a human-readable data serialization format.

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Why Choose Withdata YAML to Excel Converter?

🔒 100% Local & Secure

YAML files are read and converted on your own computer. Nothing is uploaded to any cloud server.

⚡ Fast Streaming Conversion

Large YAML files are processed in streaming mode with low memory usage — millions of rows within a minute.

📁 Batch & Merge

Batch convert many YAML files to Excel files, or merge multiple YAML files into one Excel.

🔄 Nested YAML → Dotted Columns

Nested mappings become address.city-style column names; sequences and block scalars are expanded automatically.

🖥 Windows, macOS, Linux

Native builds for Windows, macOS and Linux, with a step-by-step GUI wizard and a command line interface.

⏱ CLI & Scheduled Tasks

Save a conversion session and run it automatically from Windows Task Scheduler or crontab.

Full Feature Comparison

Feature	Supported details
Input source	Local YAML (`.yaml`, `.yml`), batch YAML, merged YAML
Output format	Excel workbook (`*.xlsx`), without Microsoft Excel installed
Conversion mode	Single file · merge many YAML files into one Excel · batch (one to one)
Running mode	GUI wizard · command line · scheduled tasks
Source options	Dotted column names for nested mappings, row source, encoding
Output options	Column mapping, encoding, date format, empty value handling
Platform	Windows, macOS, Linux (native, 64-bit)

All YAML to Excel Conversions You Need

Single YAML file → Excel file, step by step in the GUI wizard
Batch convert multiple YAML files → multiple Excel files
Convert YAML to Excel in the command line, and run it as a scheduled task
All YAML conversion tools and all Excel conversion tools

YAML to Excel Notes

A top-level sequence of mappings is read as a table — each mapping becomes one row.
Nested mappings are flattened into dotted column names, e.g. address.city, address.zip.
Block scalars (|, >) are read as multi-line text.
Both .yaml and .yml files are accepted; UTF-8 (with or without BOM) is detected automatically.
Not supported: anchors and aliases (& / *), tags (!!) and multi-document files (---).

How to Convert YAML to Excel (4 Steps)

Open Withdata DataFileConverter and select YAML as the input type and Excel as the output type.
Load your YAML data — a single file, a folder / list of files for batch conversion, or several files to merge into one.
Check the preview table, then adjust the source options and the output options.
Click Convert — the Excel output is written in seconds. Save the session if you want to run it again from the command line.

Convert YAML to Excel in GUI

In GUI mode the conversion is a step-by-step wizard: choose the YAML source, choose the Excel destination, check the preview, and click Convert. See Withdata DataFileConverter.