What YAML formats does this converter support?

The tool is optimised for a YAML array of objects — the most common format when exporting data from APIs, databases, or configuration systems. Each item in the sequence becomes one CSV row. Primitive sequences (a list of strings or numbers) are also supported, producing a single-column CSV.

How are nested objects and arrays handled?

Nested objects are flattened using dot notation. For example, a field address.city in YAML becomes the column header address.city in the CSV. Nested arrays are indexed: tags[0], tags[1], etc. This mirrors the behaviour of tools like jq and most ETL pipelines, so the output imports cleanly into Excel, Google Sheets, or pandas.

What if my YAML has missing or inconsistent keys across items?

The converter collects every key that appears in any row, then fills blank cells with an empty string for rows that lack that key. You always get a rectangular CSV — no jagged columns, no crashes on partial data.

Does my data leave my device?

No. All parsing and conversion happens entirely inside your browser using the js-yaml library. Your YAML is never uploaded to any server, never stored in the cloud, and never logged. The tool works fully offline once the page has loaded.

Does it work on mobile?

Yes. The tool works in any modern browser — Safari on iPhone and iPad, Chrome on Android, Edge on Windows. Paste your YAML into the text area and tap Convert. Download saves the CSV to your device.

YAML to CSV Converter — Array of Objects

Convert a YAML array of objects to CSV instantly in your browser. Nested fields are flattened using dot notation — no upload, no signup required.

100% client-side · no upload. YAML is parsed and converted inside your browser. Nothing is sent to a server.

YAML input (array of objects)

Download .csv

Paste YAML above and click Convert.

CSV output

How to use

Paste a YAML sequence (array of objects) into the input box above.
Click Convert to CSV — nested fields are automatically flattened using dot notation.
Click Copy CSV to paste into Excel or Google Sheets, or Download .csv to save the file.

Related data tools

Common use cases

Frequently Asked Questions

What YAML formats does this converter support?: The tool is optimised for a YAML array of objects — the most common format when exporting data from APIs, databases, or configuration systems. Each item in the sequence becomes one CSV row. Primitive sequences (a list of strings or numbers) are also supported, producing a single-column CSV.
How are nested objects and arrays handled?: Nested objects are flattened using dot notation. For example, a field address.city in YAML becomes the column header address.city in the CSV. Nested arrays are indexed: tags[0], tags[1], etc. This mirrors the behaviour of tools like jq and most ETL pipelines, so the output imports cleanly into Excel, Google Sheets, or pandas.
What if my YAML has missing or inconsistent keys across items?: The converter collects every key that appears in any row, then fills blank cells with an empty string for rows that lack that key. You always get a rectangular CSV — no jagged columns, no crashes on partial data.
Does my data leave my device?: No. All parsing and conversion happens entirely inside your browser using the js-yaml library. Your YAML is never uploaded to any server, never stored in the cloud, and never logged. The tool works fully offline once the page has loaded.
Does it work on mobile?: Yes. The tool works in any modern browser — Safari on iPhone and iPad, Chrome on Android, Edge on Windows. Paste your YAML into the text area and tap Convert. Download saves the CSV to your device.

Last updated: 2026-05-20 By jarvisbox

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