Rename Columns in YAML Files Online
Rename columns in YAML files instantly in your browser. No upload, no server — your data stays on your device.
Drop your .yaml file here
or click to browse — max 50 MB
About this tool
Rename any or all column headers in a YAML file in one step. Type new names directly in the editor and download the updated file. No formulas, no scripts — just point and click.
Frequently Asked Questions
Can I rename all columns in a YAML file at once?
Yes. The tool shows an editable name field for every column. Change any number of them in a single pass.
Are there restrictions on what I can name columns in a YAML file?
Avoid commas, newlines, and null characters in column names. Most other special characters including spaces, hyphens, and dots are safe.
Does renaming columns affect the row data in the YAML file?
No. Only the column headers change. All row values stay exactly the same.
Is my data private?
Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.
What is the maximum file size?
The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.
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