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YAML to CSV Converter

Paste a YAML array of objects and get a CSV file — nested keys are flattened with dot notation, and you can choose delimiter, quoting mode, and whether to include a header row.

Last updated: May 27, 2026

Client-Side Processing
Input Data Stays on Device
Instant Local Execution

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What is YAML to CSV Converter?

YAML is a popular format for configuration and data fixtures, but spreadsheet tools and data pipelines expect CSV. Converting a YAML array to CSV by hand — writing each key as a column header, flattening nested objects, and handling quoting — is mechanical work.

This tool reads a YAML array of objects, flattens each item (nested keys become `parent.child` column names), and emits a CSV with optional header row and configurable delimiter. Arrays within objects are serialized as pipe-separated strings so they fit in a single cell.

How to Use YAML to CSV Converter

1

Paste a YAML array of objects into the input panel.

2

Choose the output delimiter: comma, semicolon, or tab.

3

Toggle quoting mode and header row.

4

Copy or download the CSV.

Common Use Cases

  • Exporting YAML fixture data for import into a spreadsheet or database.
  • Converting a YAML configuration listing to a tabular report.
  • Turning a YAML data dump into a CSV for analysis in Excel or Google Sheets.
  • Generating TSV output from YAML for tab-separated pipelines.

Example Input and Output

A YAML array of objects becomes a CSV with a header row.

YAML input
- id: 1
  name: Alice
  active: true
- id: 2
  name: Bob
  active: false
CSV output
id,name,active
1,Alice,true
2,Bob,false

Privacy

All YAML parsing and CSV generation happen in your browser. No content is sent to a server.

Tab output

Select the Tab delimiter to produce TSV output. The download button will save it with a .tsv extension.

Frequently Asked Questions

What happens to nested objects?
Nested mappings are flattened with dot-notation keys. For example, address.city becomes a column named "address.city".
How are arrays within objects handled?
Array values inside an object are joined with " | " as a single cell value. Complex nested arrays are serialized as JSON.
Can I use this with a single YAML object (not an array)?
Yes — a single mapping produces one data row. If the mapping contains a key whose value is an array of objects, that array is used as the rows.
Does this send my YAML anywhere?
No. All conversion happens locally in your browser.

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