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CSV to YAML Converter

Convert CSV files to YAML format

Convert a CSV file into YAML in your browser. Each row becomes a list item with your column headers as keys, indented and ready to paste into a config file, a Helm values file, or an Ansible variables file.

YAML is whitespace-significant and has more reserved forms than people expect: a value like yes, no, on, off, or a string of digits with a leading zero changes meaning if it is written bare. Values are quoted where YAML requires it so the document you get back means what your spreadsheet said.

This is the quickest path from a table someone maintains in a spreadsheet — environments, feature flags, service definitions, seed records — to the YAML your tooling actually reads.

Files stay on this deviceRuns entirely in your browserFree — no signup

Drop your file here or browse from your device

Accepts CSV, TSV, TXT. Maximum input: 10 MiB. Files above this hard limit are rejected before local processing.

How to Convert

  1. Upload your CSV file or paste CSV data
  2. Review the generated YAML in the preview
  3. Copy the YAML or download the file
  4. Paste it into your config, values, or fixture file

Features

  • Each CSV row becomes a YAML list item keyed by your headers
  • Consistent two-space indentation
  • Quotes values where YAML would otherwise reinterpret them
  • Handles values containing colons, hashes, and line breaks
  • Preview the YAML before downloading
  • Copy to clipboard or download the .yaml file
  • Runs entirely in your browser — no upload, no signup

Use Cases

  • Generate configuration blocks from a table maintained in a spreadsheet
  • Create Helm values or Ansible variables from a list of environments
  • Build YAML fixtures and seed data for tests
  • Turn a reference table into static site or CMS data files
  • Document structured settings in a format your tooling can read

Frequently Asked Questions

What does the YAML output look like?

A list of records: one dash-prefixed entry per CSV row, with each column header as a key and its cell as the value, indented consistently.

Why are some values quoted and others not?

Because YAML would otherwise reinterpret them. Bare yes, no, on, off, and true/false become booleans, a leading zero can imply an octal number, and a value containing a colon looks like a nested key. Quoting those keeps them as the strings your CSV intended.

What happens to values with colons or hashes?

They are quoted. An unquoted colon starts a mapping and an unquoted hash starts a comment, so either would silently corrupt the record without quoting.

Can I get nested YAML instead of a flat list?

Each row becomes a flat record. If you need nested structures, convert to JSON with nested header expansion first — dot-path headers such as user.name become real nested objects there.

Is YAML or YML the right extension?

Both are read by every common parser. The YAML project recommends .yaml, while some ecosystems, notably older Kubernetes and CI tooling, conventionally use .yml.

Is my data private?

Yes. The CSV is parsed and converted in your browser and its contents are not sent to the app server.

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Need to convert the other way? Try our Yaml To Csv