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YAML

YAML Ain't Markup Language

YAML expresses the same data model as JSON using indentation instead of braces, plus comments and anchors. It became the standard for configuration — Kubernetes, GitHub Actions, Docker Compose, Ansible — so most YAML conversion is developers moving between a config file and an API payload.

Extensions: .yaml .yml
MIME type: application/yaml
Also called: yml

01 Convert YAML to something else

YAML to JSON Multi-document files handled. Indentation errors get a line number.
YAML to CSV Finds the list in your config and tabulates it.
YAML to XML Config in, markup out. Keys sanitised to legal element names.

02 Convert something else to YAML

JSON to YAML Ambiguous strings quoted automatically. Safe for Kubernetes manifests.
CSV to YAML A spreadsheet of config values, as a YAML list.
XML to YAML Markup in, readable config out.

03 Related formats

JSON
CSV
TSV
XML
TOML
XLSX
XLS

Opening a .yaml file

If you landed here because something handed you a .yaml file and nothing on your machine will open it, converting it to a format you already have a reader for is usually faster than installing new software. Every conversion above runs in this browser — the file is not uploaded, so it works on a locked-down work machine and on a file you are not allowed to send anywhere.