YAML to CSV Converter
Convert YAML to CSV online, free and instantly. Runs entirely in your browser — nothing is uploaded, and there is no file size limit.
Input
Output
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About this tool
Convert YAML into CSV in a single step. YAML is the configuration format used by Kubernetes, CI pipelines and Docker Compose; CSV is the lowest common denominator for spreadsheets and data exports. The converter is structure-aware rather than a text substitution, so nested data is flattened predictably.
When you would use it
- Opening YAML data in Excel, Numbers or Google Sheets
- Migrating a dataset from YAML to CSV
- Inspecting YAML in a shape that is easier to read
Worked example
id: 4815 name: Ada Lovelace active: true score: 91.5 roles: - admin - editor address: city: London postcode: NW1
id,name,active,score,roles[0],roles[1],address.city,address.postcode 4815,Ada Lovelace,true,91.5,admin,editor,London,NW1
Things worth knowing
- Structure and values are mapped directly between YAML and CSV.
- CSV completely flat — it has no nesting, no types and no agreed standard for quoting, which shapes how the output is written.
Questions
Frequently asked
Is YAML to CSV conversion lossless?
Not entirely. CSV is flat, so nested structures are flattened into dot-notation columns. The data survives and can be rebuilt, but the shape is expressed in the column names rather than the structure.
Why convert YAML to CSV?
YAML is the configuration format used by Kubernetes, CI pipelines and Docker Compose, while CSV is the lowest common denominator for spreadsheets and data exports. Converting is usually about handing data to a tool that only speaks one of them — a spreadsheet, for instance.
Is my data uploaded anywhere?
No. Every tool on JSONWorks runs entirely in your browser using JavaScript. Your input is never sent to a server, never logged and never stored. The simplest proof is to disconnect from the internet — the tools keep working. The site does load Google Fonts and a Google Analytics page-view tag, so you will see those two requests in your network tab, but neither receives anything you type or paste.
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