Convert CSV to YAML
Quickly convert a CSV file to a YAML file. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Convert CSV to YAML
- 1. Paste the CSV data. Enter your comma-separated rows in the input pane. Each data row becomes one YAML list item, and the result updates live on the right while you tweak the input or the settings.
- 2. Map columns to keys. Check First row is header so column names become the keys of each mapping. Without it, rows are emitted as plain YAML sequences of values, which suits positional data like coordinates.
- 3. Control typing and indentation. Parse numbers and booleans writes 36 and true as YAML scalars instead of quoted strings. The Indent number sets how many spaces nest each level; 2 is the convention in most YAML linters.
- 4. Copy the YAML. Use the copy button and paste the list into your config file, Ansible vars or CI matrix. Because YAML is whitespace-sensitive, keep the indentation the tool produced rather than reflowing it by hand.
When to use Convert CSV to YAML
Convert CSV to YAML turns spreadsheet rows into the config-file dialect that DevOps tooling prefers. Kubernetes manifests, Ansible inventories, GitHub Actions matrices and Home Assistant configs all consume YAML lists of mappings, and hand-converting more than a few rows invites indentation mistakes. Paste the table, set the header option, done.
- Building an Ansible inventory. Ops tracks servers in a spreadsheet with hostname, region and role columns. Convert the CSV to a YAML list and paste it into group_vars, keeping the sheet as the source of truth.
- Generating a CI test matrix. You maintain a grid of OS and runtime versions in a shared sheet. Converting it to YAML gives you the matrix block for a GitHub Actions workflow without manually nesting each combination.
- Seeding fixtures for a Rails app. Rails reads db fixtures from YAML files. Export sample users from your spreadsheet, convert with number parsing on so ids stay integers, and drop the result into test/fixtures.
Examples
Convert a spreadsheet with a header row
Input
name,age Ada,36 Grace,45
Output
- name: Ada age: 36 - name: Grace age: 45
About the Convert CSV to YAML tool
Convert CSV to YAML is a free online tool that works entirely inside your web browser. Quickly convert a CSV file to a YAML file. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 133 CSV utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 3 settings, including First row is header, Parse numbers and booleans and Indent, and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Convert CSV to YAML free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.