YAML to CSV Converter

Convert YAML data to CSV format

File Converters

Tip: Paste your YAML data. If it's an array of objects, the keys will be used as CSV headers.

Input YAML Data

Paste your YAML code here...

Explore More Tools

No tools match your search.

What the YAML to CSV Converter Does

The YAML to CSV converter reads structured YAML data and rewrites it as comma-separated rows. It parses your input into mappings (key-value pairs) and sequences (ordered lists), then flattens that structure into a table. Keys become column headers. Each record becomes a row.

All parsing happens in your browser. The text you paste or the file you upload never leaves your device, so nothing is sent to a server for processing.

How the Conversion Works Under the Hood

YAML uses indentation to show nesting. A CSV file has no concept of nesting, so the tool has to map hierarchy onto a flat grid. When it reads a YAML sequence of mappings, it treats each mapping as one row and collects every key it sees into the header line.

Values that sit at the same level line up under matching columns. If a record is missing a key that others have, the tool leaves that cell blank so columns stay aligned. Malformed indentation or unsupported YAML features trigger a parsing error, which points you to the spot that needs fixing.

How to Convert YAML to CSV

The workflow uses a paste-or-upload input and a read-only output area. Follow these steps:

Open the YAML to CSV Converter from the File Converters menu.
Paste your YAML into the input box, or upload a .yaml or .yml file.
Read the CSV result in the output area as soon as parsing finishes.
Click "Copy" to send the result to your clipboard, or "Download" to save it as a file.

Here is the kind of YAML that maps cleanly to a table:

- name: Ada
  role: Engineer
  city: London
- name: Grace
  role: Analyst
  city: Boston

That sequence turns into three columns (name, role, city) and two data rows plus a header line.

When to Use It and How It Differs

Choose this tool when you have configuration data, export dumps, or list-style YAML that a spreadsheet needs to read. CSV opens in Excel, Google Sheets, and most database import screens, while YAML does not. Converting bridges that gap.

Compared to related tools on this site, the difference is in the shape of both the input and the output:

This converter reads indented YAML and writes comma-separated rows.
The CSV to YAML converter does the reverse, turning a table back into nested YAML.
Need a different target format? Send YAML to JSON, TSV, or XML instead when a spreadsheet is not your goal.
The JSON to CSV converter handles the same flattening job when your source is JSON rather than YAML.

If your data is deeply nested, flatten it or split it before you convert, since a flat table cannot hold arbitrary nesting.

FAQ

It is a tool that reads YAML data and rewrites it as comma-separated values. It parses the mappings and sequences in your input, collects every key as a column header, and lays out each record as a row. The result is a plain text table that spreadsheets and database import screens can read directly.

Paste your YAML into the input box, or upload a .yaml or .yml file. The CSV output appears in the output area once parsing finishes. From there you click "Copy" to move the result to your clipboard, or "Download" to save it as a file on your device. No extra setup is needed.

No. The conversion runs entirely in your browser using client-side code. The YAML you paste or the file you select is parsed on your own machine, and the CSV result is built there too. Because nothing is transmitted, you can work with private configuration files without them ever leaving your device.

A sequence of mappings converts most cleanly. Each mapping in the list becomes one row, and the keys inside it become columns. That flat, list-of-records shape mirrors how a table works, so the mapping between YAML and CSV is direct. Uniform keys across records give you the tidiest output.

A CSV file is a flat grid with no room for nesting. When YAML contains mappings inside mappings, the converter cannot fold that depth into a single clean cell without losing meaning. For reliable output, flatten nested values into top-level keys first, or split the data into separate tables that each hold one level.

The tool collects every key that appears anywhere in your data to build the header row. When a record lacks one of those keys, the matching cell is left blank so the columns stay aligned. This keeps rows readable in a spreadsheet, since each value still lines up under the correct heading.

YAML relies on consistent indentation and valid syntax. If a line uses mixed spaces and tabs, breaks the expected nesting, or uses a feature the parser does not support, the read fails and an error is shown. The message points to the affected area so you can correct the indentation or structure and convert again.

The direction and the transformation differ. This tool reads indented YAML and flattens it into comma-separated rows with a header line. The CSV to YAML converter does the opposite: it reads a table and builds a nested YAML sequence of mappings from it, using the header row as keys. Pick the one that matches your source format.

Yes. Alongside CSV, YAML can be converted to JSON, TSV, or XML. Each target keeps a different amount of structure: JSON and XML preserve nesting, while CSV and TSV flatten data into rows. Choose CSV when a spreadsheet or database import is the goal, and choose JSON or XML when you need the hierarchy intact.

Because parsing runs in your browser, the practical limit is your device memory rather than a server cap. Small and medium files convert without trouble. Very large YAML files may slow the browser tab, since the whole document is read and rebuilt in memory at once. Splitting a huge file into parts helps in that case.

You can upload files with a .yaml or .yml extension, which are the two standard endings for YAML documents. You can also skip the upload and paste text straight into the input box. Both routes feed the same parser, so the output is identical whether you upload a file or paste the content.