Why convert YAML to CSV?
Data sets authored in YAML for human readability - product catalogues, contact lists, test fixtures - often need to reach a spreadsheet, a database, or a reporting tool. .CSV is the universal exchange format for that transfer, accepted by Excel, Google Sheets, and virtually every database importer.
How to convert YAML to CSV
Command line - yq CLI
Run yq -o=csv '.' input.yaml > output.csv after installing yq (free, Windows / macOS / Linux) from github.com/mikefarah/yq.
Python - PyYAML + csv FREE
Install PyYAML via pip, then load with yaml.safe_load() and write rows with the built-in csv.DictWriter.
Python - pandas FREE
After pip install pandas pyyaml, convert in one line: pd.DataFrame(yaml.safe_load(open('input.yaml'))).to_csv('output.csv', index=False).
About these formats
.YAML
YAML Ain't Markup Language file
A .yaml (or .yml) file is plain-text structured data or configuration written in YAML, used for CI/CD pipelines, Docker Compose, Kubernetes manifests, and app config. Open it in any code…
Open .YAML details →
.CSV
Comma-Separated Values
A CSV file stores tabular data as plain text - one row per line, values separated by commas (or semicolons in European locales). Any spreadsheet opens it: Excel, Google Sheets, LibreOffice…
Open .CSV details →Quality & what to watch
- Only flat, uniform YAML sequences convert cleanly - nested configs (Kubernetes, Docker Compose, CI pipelines) produce meaningless or empty CSV output.
- YAML comments and type distinctions (integers, booleans) are silently lost; values like
yes,no,on, oroffmay be misread as booleans by older parsers. - Column order follows the key order of the first record; if you need a specific order, define
fieldnamesexplicitly or reorder keys in the source file.
Frequently asked questions
My YAML has nested objects. Can I still convert it?
Does this work with multi-document YAML files separated by `---`?
yq eval-all '[.]' input.yaml before passing to the CSV output flag; the documents must still be uniform flat sequences.
