Withdata DataFileConverter converts Excel workbooks (*.xlsx) to YAML locally —
single file, batch, or merge multiple Excel files into one YAML.
No Microsoft Excel installation is required. 100% local, secure, and cross-platform.
An Excel workbook contains one or more worksheets.
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Why Choose Withdata Excel to YAML Converter?
🔒 100% Local & Secure
Excel files are read and converted on your own computer. Nothing is uploaded to any cloud server.
⚡ Fast Streaming Conversion
Large Excel files are processed in streaming mode with low memory usage — millions of rows within a minute.
📁 Batch & Merge
Batch convert many Excel files to YAML files, or merge multiple Excel files into one YAML.
🔄 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 Excel workbook (*.xlsx), batch workbooks, selected worksheets |
| Output format | YAML with configurable indent (default 2) and flow style |
| Conversion mode | Single file · merge many Excel files into one YAML · batch (one to one) |
| Running mode | GUI wizard · command line · scheduled tasks |
| Source options | Worksheet selection, header row, start row |
| Output options | Column mapping, encoding, date format, empty value handling |
| Platform | Windows, macOS, Linux (native, 64-bit) |
All Excel to YAML Conversions You Need
Excel to YAML Notes
- A workbook can contain several worksheets; you choose which ones to read.
- Microsoft Excel does not have to be installed.
- Optionally, each worksheet can be written to a separate output file.
- The output indent can be set (2 spaces by default).
- Flow style (
{ } / [ ]) can be enabled or disabled.
- Dotted column names can be written back as nested YAML mappings.
How to Convert Excel to YAML (4 Steps)
- Open Withdata DataFileConverter and select Excel as the input type and YAML as the output type.
- Load your Excel 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 YAML output is written in seconds. Save the session if you want to run it again from the command line.
Convert Excel to YAML in GUI
In GUI mode the conversion is a step-by-step wizard: choose the Excel source, choose the YAML destination, check the preview, and click Convert.
See Withdata DataFileConverter.
FAQ
It converts millions of rows within a minute. Large files are processed in streaming mode with low memory usage.
Yes. All conversions run locally on your computer — nothing is uploaded to any server, so your data stays private.
Yes. Withdata DataFileConverter has native builds for Windows, macOS and Linux, with both a GUI and a command line.
Yes. You can batch convert a whole folder of Excel files to YAML files in one run.
Yes. Multiple Excel files can be merged into a single YAML file in one run.
Yes. Save the conversion session in the GUI, then run it from the command line, Windows Task Scheduler or crontab.
No. Excel workbooks are read and written natively, without Microsoft Excel installed.
Yes. Select the worksheets you need, or write each worksheet to a separate output file.
Start Converting Excel to YAML Today
Download Withdata DataFileConverter for a free trial. Runs on Windows, macOS and Linux.
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