#444 · Developer Tool

HTML Table to CSV

Convert the first HTML table in a pasted document to standards-friendly CSV. Cell text is normalized, quotes are escaped, and rowspan or colspan values are expanded into a rectangular grid so spreadsheet columns stay aligned. The preview reports the resulting dimensions and warns when spans required filled cells.

Developer Input

CSV conversion
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How to use this developer tool

  1. Paste source text or load the representative sample.
  2. Adjust the available parsing option when the tool provides one.
  3. Select Convert Table or press Ctrl/Cmd + Enter.
  4. Review the summary, issues, and copy-ready output before using it.

What this developer tool does

Rows are read in document order. A grid occupancy map places each th or td at the next free column, then repeats its text across the declared rowspan and colspan. Every CSV field is quoted and embedded quotes are doubled.

Rows are read in document order. A grid occupancy map places each th or td at the next free column, then repeats its text across the declared rowspan and colspan. Every CSV field is quoted and embedded quotes are doubled.

Visual tables created entirely with CSS div elements are not recognized. Nested tables are ignored when reading a parent cell to avoid duplicating their text.

Example

Input

<table>
  <thead><tr><th>Plan</th><th>Monthly price</th><th>Seats</th></tr></thead>
  <tbody>
    <tr><td>Starter</td><td>$9</td><td>3</td></tr>
    <tr><td>Team</td><td>$29</td><td>10</td></tr>
  </tbody>
</table>

Expected result

Run the sample to see a structured report generated by the same processing logic used for pasted input.

Use cases

  • Review front-end source during a code migration.
  • Create a structured handoff for documentation or QA.
  • Catch input-specific issues before committing generated output.

Tips for reliable output

  • Paste the smallest complete fragment that reproduces the case.
  • Use the sample once to confirm the expected input shape.
  • Review warnings instead of treating a clean report as a guarantee.
  • Keep the original source in version control before replacing it.
  • Test generated output in the target browser or application.

Processing details

Rows are read in document order. A grid occupancy map places each th or td at the next free column, then repeats its text across the declared rowspan and colspan. Every CSV field is quoted and embedded quotes are doubled.

Visual tables created entirely with CSS div elements are not recognized. Nested tables are ignored when reading a parent cell to avoid duplicating their text.

Frequently asked questions

How are rowspan and colspan converted to CSV?

The cell text is repeated into each grid position covered by the span so later columns remain aligned.

Are commas and quotes inside table cells escaped?

Yes. Every field is quoted and embedded double quotes are doubled according to common CSV rules.

Which table is converted when the HTML contains several tables?

Only the first table element in the pasted document is converted.

Does nested table text appear in a parent cell?

No. Nested tables are removed from the parent-cell text extraction to avoid duplicated data.

Can a CSS grid made from div elements be converted?

No. The converter requires semantic table, tr, th, and td elements.

Output fields

FieldMeaning
SummaryCount and outcome of the current run
InterpretationWarnings and practical review guidance
ExportsCopy-ready output plus CSV or JSON when available

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