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Convert CSV to YAML

Paste your CSV and this tool converts it to YAML instantly, right in your browser. CSV is a flat, tabular format that opens directly in Excel, Google Sheets, and database import tools. YAML is a human-friendly, indentation-based format popular for configuration like Docker Compose, Kubernetes, and CI pipelines.

The conversion is completely client-side: there's no upload, no queue, and no account. Big files are converted in the background with a Cancel button, the options for the lossy steps are one click away, and your last conversion is remembered.

Looking for a different conversion? See all format converters.

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CSV to YAML Converter — frequently asked questions

How do I convert CSV to YAML?
Paste your CSV, or open or drop a file, and the YAML appears instantly. Copy it, download it (named after your file), or open it in another tool. Errors point to the line and column. Everything happens in your browser.
Does it use the first row as headers, and keep my zip codes?
Yes. The first row is the column names. Each column gets one type: numbers only when every value is a plain number, so zip codes and ids like 01234 stay text with their leading zeros. Tick "Keep values as text" to read everything as text. A file with one column works, and short rows are padded and listed by line number.
Is my data uploaded to a server?
No. The conversion runs entirely in your browser — your data never leaves your device, so it's safe to convert configuration, API payloads, and other sensitive files. You can even go offline once the page has loaded.
Is this converter really free?
Yes. No sign-up, no payment details, no file-size paywall, and no watermark on the output.

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JSONYAMLJSONXMLJSONCSVYAMLJSONYAMLXMLYAMLCSVXMLJSONXMLYAMLXMLCSVCSVJSONCSVXMLJSONJSON LinesJSON LinesJSONJSON LinesCSVCSVJSON LinesJSONTSVTSVJSONCSVTSVTSVCSVJSONTOMLTOMLJSONYAMLTOMLTOMLYAML

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