DataShift

Convert YAML to CSV Online

Flatten a YAML list of records into a CSV file — handles nested mappings and type inference.

YAML → CSV

Free YAML to CSV converter. Paste a YAML list and get a flat CSV. Nested mappings become dot-notation columns. Works in your browser.

100% local — no uploads
Input · YAML

Output will appear here

How to use the YAML → CSV

  1. Paste or upload your YAML data

    Paste text directly into the input box, drag and drop a file onto it, or click "Upload file" to browse. Conversion starts instantly on paste — no button click required.

  2. Configure options (optional)

    Open the Options panel to customise delimiter, headers, nested-object flattening, and more. Use the Field Selector to pick exactly which columns appear in the output.

  3. Copy or download your CSV

    Click Copy to grab the result, or Download to save the file. Everything runs locally in your browser — no data ever leaves your device.

Frequently Asked Questions

Is my data safe?
Yes. Every conversion runs entirely inside your browser. No data is ever transmitted to a server. The tool works offline once loaded.
What is the maximum file size?
There is no hard limit. Files under 1 MB convert instantly. Files 1–10 MB show a progress indicator. Files over 10 MB prompt a warning and run in a background thread to keep the browser responsive.
Why does my YAML fail to parse?
Common causes are trailing commas, single-quoted strings, unquoted keys, or missing closing brackets. The converter auto-repairs many of these and tells you exactly what it changed.
Can I convert multiple files at once?
The tool handles one file at a time. For bulk conversion, consider the csvjson CLI or API.

How it works

Step 1

YAML sequences become rows

A YAML sequence (list) of mappings maps directly to CSV rows, with keys as column headers. Nested mappings use dot-notation columns.

Example

YAML config list to CSV report

Input
- name: web-01
  ip: 10.0.1.1
  role: web
- name: db-01
  ip: 10.0.1.2
  role: database
Output
name,ip,role
web-01,10.0.1.1,web
db-01,10.0.1.2,database

Frequently asked questions

What if the YAML contains anchors and aliases?

Anchors and aliases are resolved before conversion, so the CSV shows the actual values rather than reference tokens.

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All conversions run in your browser — nothing is uploaded.

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