YAML to CSV Converter

Paste a YAML sequence of mappings and download it as a CSV file.

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Instant download once converted

Need to go the other way? Convert CSV to YAML →

YAML to CSV: Turning Configuration Data into Spreadsheet Rows

YAML configuration files, fixture data, and API specification exports often contain lists of records that are more useful as a spreadsheet. Converting YAML to CSV extracts those records into a flat table that can be opened in Excel, imported into a database, or processed by any CSV-aware tool — without manually transcribing the data.

ConvertRow uses js-yaml to parse your YAML entirely in the browser. Paste a YAML sequence of mappings — the standard format for fixture files, Kubernetes resource lists, and Ansible inventories — and click Convert. Each mapping becomes a CSV row and each mapping key becomes a column header.

All processing is local. Your YAML content is never sent to a server, which is important for configuration files that may contain API keys, credentials, or infrastructure details. The resulting CSV is downloaded directly from your browser without any server round-trip.

For best results, your YAML should be a top-level sequence of mappings (starting with a list of - entries where each item has key: value pairs). Nested mappings and sequences within records will be serialised as YAML strings in the cell. Ensure your YAML is valid before pasting — indentation errors are the most common cause of parse failures.

Common use cases for YAML to CSV conversion:

Extracting test fixture data from a Rails or Django YAML file for review in Excel
Converting a Kubernetes ConfigMap data block into a spreadsheet
Turning an Ansible inventory or variable file into a CSV for reporting
Processing a Hugo or Jekyll data file for bulk editing in a spreadsheet
Comparing YAML configuration sets side-by-side in a spreadsheet format

Frequently Asked Questions

What YAML structure does the converter expect?

The converter expects a YAML sequence of mappings — a list (starting each item with -) where each item is a flat set of key: value pairs. For example: - name: Ada\n role: Engineer. A single mapping (object) is also accepted and treated as one row.

How are YAML null values and booleans handled?

YAML null values (null, ~, or empty) become empty CSV cells. Booleans (true/false) are written as the strings "true" and "false". Numbers are written as their numeric string representation without quotes.

What happens with nested YAML structures?

Nested mappings and sequences are serialised as a JSON-like string in the CSV cell. If you need nested data in separate columns, flatten the YAML structure before converting.

My YAML file has comments — will they cause errors?

No. Comments in YAML (lines starting with #) are ignored by the parser and do not appear in the CSV output. The converter only processes the data nodes.

Can I convert a YAML file with multiple documents (separated by ---)?

The converter processes the first YAML document only. Multi-document YAML files (separated by --- dividers) are common in Kubernetes manifests — split them into individual files first if you need to convert each document separately.