CSV to YAML Converter

Drop a CSV file below and get YAML back in seconds — converted on your own device, not uploaded anywhere.

Drop a file here or click to choose one — CSV

Processed entirely in your browser using a Web Worker. Nothing is uploaded.

What is CSV?

CSV (Comma-Separated Values) is a plain-text table format — one line per row, fields separated by commas. It's the closest thing to a universal format for spreadsheets and simple databases: nearly every spreadsheet app, database and programming language can read it, but it can only represent flat tables, not nested structures.

What is YAML?

YAML ("YAML Ain't Markup Language") is a plain-text format for the same kind of structured data as JSON, written to be easier for humans to read and edit — indentation instead of braces, no required quotes on simple strings. It's common in configuration files (Docker Compose, GitHub Actions, Kubernetes) and is a superset of JSON: valid JSON is also valid YAML.

How it works

  1. Drop your CSV file into the box above, or click to choose one.
  2. Your browser parses it and rewrites it as YAML instantly — nothing is sent anywhere.
  3. Download the YAML file. That's it.

Other conversions

CSV to JSON

feeding spreadsheet data into an API, script or database that expects JSON

JSON to CSV

opening API output or a config file in a spreadsheet

JSON to YAML

turning API output or a data export into a more human-editable config file

YAML to JSON

feeding a YAML config file into a tool or script that only reads JSON

YAML to CSV

opening a YAML config file's data in a spreadsheet

Questions.

Is my file uploaded to a server?

No. The conversion runs entirely in your browser — your CSV file never leaves your device.

Does anything get lost converting to YAML?

No — every value in the CSV is preserved. Each row becomes one item in a YAML list, with the header row supplying each field's key; empty cells become empty strings.

Is there a file size limit?

No limit is enforced by the tool itself — the practical ceiling is your browser's available memory, which handles typical data files easily.

Is this really free?

Yes — every format conversion on ByteRivet is free, with no account or daily limit.

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