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CSV to YAML

Block style, two-space indent, strings quoted only where they need to be.

  • 100% local conversion
  • No file uploads
  • Preserves structure
  • Supports large files
Example Output
- name: Ada
  role: Engineer

Convert CSV to YAML →

Convert CSV to YAML Drop a spreadsheet, pick an output format, and download the result. Everything runs in your browser — the file never leaves your machine.
info Supports CSV, TSV, TXT • Max file size: 100 MB
Convert to:

More formats coming soon

Also: YAML to CSV

Paste a YAML sequence of mappings and download it as a CSV file.

CSV to YAML: A Practical Developer's Conversion Guide

YAML (YAML Ain't Markup Language) is the configuration and data format preferred by DevOps tools, CI/CD pipelines, Kubernetes manifests, Ansible playbooks, and many Ruby and Python frameworks. If your data lives in a spreadsheet and needs to move into one of these systems, converting CSV to YAML is the fastest path.

ConvertRow turns each CSV row into a YAML mapping (key-value block) and wraps all mappings in a top-level sequence. The column headers become the mapping keys. The output is clean, indented YAML that can be pasted directly into a configuration file or processed by any YAML parser.

The conversion happens entirely in your browser using js-yaml, a robust open-source YAML library. No data is uploaded, no server is contacted, and the tool works offline. This makes it safe to use for environment variable files, secrets configuration, or other sensitive developer data.

For best results, use lowercase snake_case or camelCase column headers — YAML keys are case-sensitive and most YAML-consuming tools expect a consistent naming convention. Numeric values are preserved as-is in the output. If a cell contains a colon or a hash character, the YAML serialiser will automatically add quotes to keep the output valid.

Common use cases for CSV to YAML conversion:

  • Generating Kubernetes ConfigMap or Secret data from a spreadsheet
  • Creating Ansible variable files from a team-managed CSV
  • Seeding a Ruby on Rails fixture file from a data export
  • Producing a Hugo or Jekyll data file for a static site
  • Preparing configuration data for a CI/CD pipeline tool

Frequently Asked Questions

The output is a YAML sequence of mappings. Each record is a block mapping starting with a dash (-) and each column header is a key on its own indented line. For example: - name: Ada\n role: Engineer

ConvertRow outputs values as they appear in the CSV. Pure numeric values are written without quotes so YAML parsers will read them as numbers. If you need a column to always be treated as a string (e.g. a zip code like "01234"), pad it with a leading apostrophe in the CSV first.

Blank cells are written as YAML null values (the tilde character ~). This signals to YAML parsers that the key exists but has no value, which is the correct representation of a missing or optional field.

Yes, with a small adjustment. Kubernetes YAML files have a specific structure (apiVersion, kind, metadata, spec, data). The ConvertRow output gives you the data payload in YAML sequence format — you would paste it under the relevant key in your manifest rather than replacing the entire file.

Yes. If a CSV cell contains newlines (possible in quoted CSV cells), the YAML serialiser outputs them using YAML's literal block scalar style (| notation) to preserve the line breaks in the converted file.