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CSV to YAML Converter

Convert CSV spreadsheets into structured YAML, or flatten a YAML list of records back into CSV — instantly, in your browser.

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Free Online CSV to YAML Converter — Turn Spreadsheets Into Structured Data

Our free online CSV to YAML converter turns flat spreadsheet rows into a structured YAML list of records (or collapses a flat YAML list back into CSV) with a single click. It's a fast way to move tabular data — exported from Excel, Google Sheets, or a database — into configuration files, fixtures, or automation scripts that expect YAML.

Why Convert CSV to YAML?

CSV is the universal export format for spreadsheets and databases, but it's strictly flat — every value is a string, and there's no way to represent nested structure. YAML, by contrast, is a natural fit for configuration: Ansible inventories, Kubernetes fixtures, static-site generator data files (Jekyll, Hugo, Eleventy), and test fixtures all commonly store lists of records as YAML. Converting a CSV export straight into that format saves you from hand-transcribing every row.

How the Conversion Process Works

  1. Select Conversion Mode: Choose CSV to YAML or YAML to CSV, and set the delimiter your CSV uses (comma, semicolon, or tab).
  2. Paste Your Data: Drop your CSV export or YAML list into the input box on the left.
  3. Automatic Mapping: The first CSV row is treated as the header. Each subsequent row becomes a YAML mapping keyed by those headers. Quoted fields containing commas, quotes, or newlines are parsed correctly.
  4. Export: Copy the result or download it as a .yaml or .csv file.

Common Use Cases

  • Static Site Data Files: Convert a spreadsheet of team members, products, or FAQ entries into a YAML data file for Jekyll, Hugo, or Eleventy.
  • Test Fixtures: Turn a QA-provided spreadsheet of test cases into YAML fixtures for your test suite.
  • Ansible & DevOps: Convert a CSV of hosts or variables into a YAML inventory or vars file.
  • Reverse Export: Flatten a YAML list of records back into CSV so it can be opened in Excel or Google Sheets for review.

Frequently Asked Questions

1. Does this tool upload my spreadsheet anywhere?

No. Both CSV and YAML parsing run entirely client-side in your browser. Your data never leaves your device.

2. Does it handle quoted fields with commas inside them?

Yes. The parser follows the standard CSV quoting rules — fields wrapped in double quotes can safely contain commas, newlines, and escaped ("") quote characters.

3. What if my CSV uses semicolons instead of commas?

Use the Delimiter dropdown to switch between comma, semicolon, and tab — common in European locale exports and TSV files.

4. Is this tool free to use?

Yes, completely free with no signup and no row limits.