CSV to YAML Converter
Convert CSV data to YAML format online. Supports custom delimiters, header rows, and configurable indentation. Quote-aware parsing handles complex CSV data.
How does CSV to YAML conversion work?
Each CSV row becomes a YAML list item starting with "- ". When "Use headers" is enabled, the first row defines keys and each subsequent row generates key: value pairs. Without headers, each row becomes a nested list of values.
What delimiter should I use?
Comma is the most common CSV delimiter. Semicolons are common in European locales where commas are used as decimal separators. Tab-separated values (TSV) use tabs, and pipe delimiters are used in some legacy systems.
How are special characters handled in YAML output?
Values containing YAML special characters (:, #, {}, [], etc.), newlines, or leading/trailing spaces are automatically quoted. Numeric-looking values and YAML keywords (true, false, null) are quoted to preserve them as strings.
What is YAML and why use it?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files, data exchange between languages, and infrastructure-as-code tools like Docker Compose, Kubernetes, and Ansible.
Can I convert large CSV files?
Yes. All processing happens in your browser using JavaScript, so there is no file size limit imposed by the server. However, very large files may consume significant memory depending on your device.
Is my data safe?
Yes. All processing happens entirely in your browser using JavaScript. No data is sent to any server. Your CSV data never leaves your device.
Can I convert YAML back to CSV?
This tool focuses on CSV to YAML conversion. For the reverse direction, you can use our YAML to CSV converter tool.
Does it support multi-line values in CSV?
Yes. The parser correctly handles quoted fields that contain newlines, commas, and other special characters within CSV data.
What indentation options are available?
You can choose between 2-space and 4-space indentation for the YAML output. The default is 2 spaces, which is the most common convention in YAML files.
How are empty values handled?
Empty CSV cells are converted to YAML null values. This ensures the output is valid YAML that can be parsed by any YAML parser.
Can I use this tool offline?
Once the page is loaded, the conversion works entirely offline since all processing is done in your browser. You do not need an internet connection after the initial page load.
What is the difference between CSV and YAML?
CSV is a flat, tabular format using delimiters to separate fields, best for spreadsheet data. YAML is a hierarchical, nested format using indentation to represent structure, ideal for configuration files and complex data relationships.
Does the tool handle Unicode and international characters?
Yes. The converter fully supports Unicode characters in both CSV input and YAML output, including CJK characters, accented letters, and right-to-left scripts.
How to Use CSV to YAML Converter
Convert CSV data into clean YAML in your browser, with header rows and indentation fully configurable. Everything runs locally, so nothing is uploaded.
- Paste your CSV content into the input area.
- Select the matching separator under Delimiter: — options include , ; Tab and |.
- Choose 2 spaces or 4 spaces under Indentation: to control the nesting depth of the YAML output.
- Enable Use headers so the first row supplies the mapping keys.
- Turn on Skip empty lines to keep blank rows out of your YAML.
- Copy the YAML from the output area into your config file or application.
Parsing is quote-aware: quoted fields keep their commas as a single value, so leave the quotes in place when pasting.
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