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How to use Markdown Table Builder

Get the best out of Markdown Table Builder: every option explained, a worked example, and what to check when the output is not what you expected.

Updated July 31, 2026

What it does

Create aligned, GitHub-ready Markdown tables with editable headers and rows. It runs entirely in your browser — your input never leaves your device.

Options

Every setting this tool exposes, straight from the code that validates it.

OptionTypeDefaultWhat it does
headerslist of textColumn headers. Required.
rowslist of list of textRow cells (array of string arrays). Required.
alignmentslist of one of: left, center, right[]Per-column alignment. Defaults to [].

Worked example

Run these settings on the tool page:

  • headers: []
  • rows: []
  • alignments: []

You get:

|  |
|  |

Getting the result you want

Most of the control here is in the options above. If the output is not what you expected, the setting to check first is alignments — those change the shape of the output rather than the input it accepts.

Troubleshooting

  • Nothing happens / the output stays empty. headers, rows are required — the tool waits until you provide them.
  • It is slow on very large input. Everything runs in your browser, so speed depends on your device. Very large inputs are best split up, or run through the API where the work happens on our servers.

Automating it

The same logic is available as a REST endpoint, so you can run it from a script, a CI job or your own app.

Bash
curl "https://api.toolsxpo.com/v1/markdown-table-builder" \
  -H "Authorization: Bearer $TOOLSXPO_KEY"

It costs 1 credit per successful call. See the full endpoint reference, or try it in the playground.

Tools covered here

Markdown Table Builder

Writing

writing

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