Step 1 / source
Choose the source
Drop one file here
Choose the local html table you want to turn into styled xlsx worksheet.
Checking publication status...LOCAL DATA CONVERTER / HTML TABLE TO EXCEL
HTML Table to Excel
Convert one flat table from a local HTML file into a genuine styled XLSX worksheet without executing the document.
Processed in this browserOne local .html or .htm file up to 2 MB, at most 20 tables, and one rectangular table within 50,001 rows, 200 columns, 1,000,000 cells, and 20 MB output.
HTML - one XLSX table
No file upload
This operation runs with browser APIs. Nirmion receives catalogue requests, not the selected source bytes.
Original stays unchanged
The converter creates a separately named output. It never writes back into the source file.
Bounded work
One local .html or .htm file up to 2 MB, at most 20 tables, and one rectangular table within 50,001 rows, 200 columns, 1,000,000 cells, and 20 MB output.
Plain-language method
How HTML Table to Excel works
Nirmion reads local HTML as text, strips active blocks, extracts one rectangular table, decodes visible cell text, and writes those values into a real XLSX worksheet. Header cells can be auto-detected from th markup, forced, or disabled.
- 01Choose a valid source
Use an authorised local HTML export with a simple table. No URL is contacted and no scripts are executed.
- 02Review the conversion choices
Auto treats first-row th cells as headers. Choose Enabled or Disabled when the markup does not describe the table accurately.
- 03Inspect the separate result
The result ends in _nirmion_tools_workbook.xlsx with optional frozen headers and filters. Links, images, styles, and spanning cells are not copied.
Useful when
Practical jobs this tool handles
- Open a saved report table as a workbook.
- Create a filterable spreadsheet from static HTML.
- Move test fixture tables into XLSX.
Before converting
Check the source and destination rules
- Select the correct table number.
- Resolve merged or nested tables first.
- Verify the first-row header decision.
Know the boundary
Know what the destination format cannot keep
Only readable cell text is transferred. Rowspan, colspan, nested tables, formulas, links, images, and CSS presentation cannot be represented by this bounded table contract.
Quick answers
Questions before you convert
The conversion contract is deliberately explicit.
Does Auto inspect visual bold text?
No. It uses semantic th elements in the first row.
Will links remain clickable?
No. Only their visible text is kept.
Can it read a live web page?
No. Choose a local HTML file you are authorised to process.