Free · No signup · Browser-based

Convert YAML to Excel.

Drop a YAML file and get a real .xlsx workbook with typed cells — numbers stay numeric and dates stay dates. Nested objects and arrays are flattened into dot-notation columns — every value kept, structure not. Runs in your browser.

To convert YAML to Excel, drop or paste a YAML file — csvtodashboard parses it into rows and columns in your browser, then emits a real .xlsx workbook with typed cells. You get a real .xlsx workbook with typed cells, so Excel won't turn your numbers or dates into text on open. Nothing is uploaded; the whole conversion runs on your device.

01 · How it works

Three steps, then done.

This reads your YAML — a sequence of mappings becomes rows, then writes a real .xlsx workbook with typed cells — numbers stay numeric and dates stay dates. Because Excel is a flat, tabular format, nested objects and arrays in your YAML are flattened into dot-notation columns (e.g. user.address.city) — that keeps every value but does not preserve the hierarchy, so the conversion is one-way. Everything runs locally in your browser.

i. drop

Drop or paste

Drag a file, click to choose, or paste data directly into the input pane.

ii. detect

We read the shape

Types are inferred so the output is correctly formatted — not strings everywhere.

iii. use it

Copy, download, or dashboard

Copy the output, download it, or hit 'Build dashboard' to chart what's in the data.

02 · Why ours

Smart Excel conversion by default.

Free Excel converters often produce sloppy output — every value quoted, types lost, errors swallowed. Ours infers types where it can, fails loudly when it can't, and pairs the conversion with a one-click path to a dashboard.

  • 01

    Correct types

    Numbers, booleans and nulls are preserved wherever Excel supports them — not every value dumped as a quoted string.

  • 02

    Local-first

    Your file is parsed and converted in your browser — verify in DevTools → Network. Nothing is uploaded, logged, or stored.

  • 03

    Fails loudly

    Malformed input gives a clear, specific error instead of silently wrong output — so you can trust what comes back.

  • 04

    One click to a dashboard

    Every conversion keeps a tabular copy, so you can send the data straight to our visualization tool to chart it.

"Needed a conversion. Ended up with a dashboard. That's the pattern."
— the typical csvtodashboard arc
Good to know

yaml to excel notes.

Format-specific details worth knowing before you convert YAML to Excel.

  • Nesting is flattened, not kept

    YAML can nest objects and arrays; converting to Excel flattens them into dot-notation columns. Every value is preserved, but the hierarchy is not — it is a one-way conversion.

  • A real .xlsx, not a renamed CSV

    The output is an OOXML workbook with typed cells, so Excel opens it directly without the import-wizard guesswork a raw CSV triggers.

  • Leading zeros and long IDs

    Excel strips leading zeros and shows long numbers in scientific notation; keep ZIP codes and identifiers as text columns to avoid that.

  • One sheet, literal values

    Each file is a single sheet of literal values — no formulas are generated, so what you open is exactly the data you converted.

03 · FAQ

yaml to excel questions.

What YAML input works?
A YAML sequence of mappings (the common data shape), block style. Nested mappings are flattened with dot notation.
Nested objects and arrays are flattened into columns using dot notation (user.name, user.address.city). Arrays of scalars are joined; arrays of objects are JSON-stringified into a single cell. Your data is preserved, but the nested structure is not — this is a one-way conversion.
A real .xlsx workbook (not a CSV renamed) with typed cells, so Excel doesn't turn your numbers or dates into text.
No. The whole yaml-to-excel conversion happens locally in your browser — the file never touches a server.
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