CSV to YAML Converter

Input CSV

or drop a file anywhere

Output YAML

Your YAML appears here as you type.

Paste data to see token savings

Convert CSV to YAML with our free online converter.

Example: CSV input and real YAML output

The output below was generated by the same conversion code the converter uses, run on this sample when the page was built.

CSV input (135 characters)

sku,name,price,stock
SKU-104,USB-C cable,9.99,240
SKU-221,Laptop stand,34.5,58
SKU-310,Webcam cover,3.25,1200
SKU-415,Desk mat,19,0

YAML output (242 characters)

- sku: SKU-104
  name: USB-C cable
  price: 9.99
  stock: 240
- sku: SKU-221
  name: Laptop stand
  price: 34.5
  stock: 58
- sku: SKU-310
  name: Webcam cover
  price: 3.25
  stock: 1200
- sku: SKU-415
  name: Desk mat
  price: 19
  stock: 0

YAML output is 79% larger than the CSV input. The same data is 252 characters as minified JSON and 373 as pretty-printed JSON. Sizes are character counts, not tokens: token counts depend on the model's tokenizer (see the tokenizer comparison).

CSV to YAML: what changes

Reading CSV: CSV has no types: every cell is read as a string, so 9.99 becomes "9.99" in the output (visible in the sample below). The first row must be the header, and nested data cannot be represented.
Writing YAML: Strings that would otherwise change type on re-read, such as '2021' or '1.0', are quoted. No comments are generated.

About CSV

Comma-Separated Values is the standard format for tabular data. Perfect for spreadsheets, data analysis, and simple data exports.

✓Spreadsheet compatible
✓Simple
✓Universal
✓Great for data analysis

Full CSV Documentation →

About YAML

YAML is a human-friendly data serialization format. It uses indentation instead of brackets, making configuration files more readable.

✓Human readable
✓No punctuation
✓Supports comments
✓Great for config

Full YAML Documentation →

Why Convert CSV to YAML?

Use YAML for configuration files, especially in DevOps (Docker, Kubernetes, GitHub Actions). It's more readable than JSON but can have ambiguity with indentation.

CSV to YAML: Frequently Asked Questions

How do I convert CSV to YAML?

Paste your CSV into the editor on json2toon.co. The tool detects the input and produces YAML instantly, then you copy the result. Conversion runs entirely in your browser, so nothing is uploaded to a server.

Is the CSV to YAML converter free?

Yes. Converting CSV to YAML on json2toon.co is free with no account, signup, or usage limit. A free public API is also available for automated, programmatic conversion.

Why convert CSV to YAML?

Convert CSV to YAML with our free online converter.

What should I watch out for when converting CSV to YAML?

Strings that would otherwise change type on re-read, such as '2021' or '1.0', are quoted. No comments are generated.

Is my data safe when I convert CSV to YAML?

Yes. The CSV to YAML conversion happens client-side in your browser. Your source data stays on your device and is never sent to or stored on a server, which makes it safe for private or sensitive payloads.