Free Online YAML to CSV Converter

Paste a YAML list of records below to flatten it into CSV rows.

Input Ready

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Output

Output statistics are available via the Stats button above this field.

Results are provided for informational purposes only and may contain errors. Please verify important information independently. Use of this tool is at your own risk.

What the YAML to CSV Converter does

The YAML to CSV Converter turns a YAML list of records into CSV rows that open directly in a spreadsheet. Each item in the list becomes a row, and each key becomes a column.

Nested keys are flattened into underscore-joined column names, so meta: {tier: frontend} becomes a meta_tier column. Columns are collected from every record, so an item that has an extra key still gets its own column instead of being cut off.

When to use it

  • An inventory, service catalog or test-case list is kept in YAML, and someone needs to review it in Excel.
  • Exporting data from a static-site generator, Ansible inventory or CI configuration into a table for a report.
  • Comparing many YAML records side by side, which is much easier in columns than in nested text.
  • Sharing a list of feature flags, routes or translations with a non-technical teammate who prefers a table.

Worked example

Input

- name: web
  port: 8080
  meta:
    tier: frontend
- name: api
  port: 3000
  meta:
    tier: backend

Output

name,port,meta_tier
web,8080,frontend
api,3000,backend

Common questions about the YAML to CSV Converter

What YAML structure does it expect?

A list of mappings at the top level (lines starting with - and key: value pairs) works best. A single mapping becomes one row; check indentation first with the YAML Validator if the result looks wrong.

How are lists inside a record handled?

A list of simple values is joined into one cell. A list of objects is flattened like any other nested data, so complex documents can produce many columns.

Are anchors and aliases supported?

Yes. YAML anchors (&name) and aliases (*name) are resolved while the file is parsed, so the CSV contains the expanded values rather than the reference markers.

Is this tool free?

Yes, it's free to use. No signup, no email required. Get results on this page.

How do I get my result?

Use the tool on this page. Your result appears here; no email delivery is required.