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CSV to YAML

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Supported formats: .csv,.xlsx,.xls,.xlsm,.xlsb,.tsv

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About CSV to YAML

Convert CSV rows into a YAML list of mappings, entirely in your browser — no upload, no file size limit.

YAML is the format of choice for config files, Kubernetes manifests, Ansible playbooks, and CI pipelines — and turning a CSV list into YAML by hand is tedious and error-prone.

This tool converts each CSV row into a YAML mapping (column name to value) inside a top-level list, using the same js-yaml library that powers YAML parsing across the rest of the toolkit, so quoting and indentation always come out valid.

Converting the other way, it reads a YAML list of mappings and flattens it back into CSV columns, taking the union of keys across all entries as the header row.

Category: Conversion & Export

Common Use Cases

  • Turning a CSV list of services or hosts into a YAML config block
  • Generating YAML fixtures for a test suite from a spreadsheet
  • Flattening a YAML export back into CSV for review in a spreadsheet

Key Features

  • Uses the same js-yaml library as the rest of the toolkit for valid, correctly-quoted output
  • Takes the union of keys across all entries when flattening YAML back to CSV
  • Handles large files in chunks so the tab stays responsive

The CSV to YAML tool is compatible with: Kubernetes Manifests, Ansible Playbooks, CI/CD Config Files.

Use CSV to JSON instead when the target system prefers JSON over YAML for the same structure.

Frequently Asked Questions

What YAML structure does it produce?

A top-level list where each item is a mapping of column name to value for that CSV row — the standard shape used by most config-as-code tools.

Will number and boolean-looking values keep their type?

Yes, the underlying YAML library serializes values with appropriate types and quoting so the output parses back correctly.

What if entries in the YAML list have different keys?

When converting YAML back to CSV, the header row is built from the union of all keys seen across every entry, leaving cells blank where a given entry lacks that key.

Built for DevOps and platform engineers turning spreadsheets into config-as-code.

Read the related guide →