XLSX to Markdown converter — Excel tables, in your browser

Convert Excel .xlsx workbooks to Markdown tables in your browser. One table per sheet, computed values, nothing uploaded.

A workbook becomes one Markdown table per worksheet, with the sheet name as the heading above it, so a three-sheet file comes out as three labelled tables in workbook order. That mapping is the whole conversion: Markdown has exactly one grid construct, and a spreadsheet has many sheets of one.

What lands in the table is the value of each cell. A formula has no representation in Markdown at all — table syntax holds text, not computation, so there is no cell you could put =SUM(B2:B40) in and have it mean anything. Only the computed value reaches the output: the figures come across and the model that produced them does not. That is what you want when you are lifting numbers into a document, and no use whatsoever if you were hoping to keep the workbook working. Merged cells are preserved as spans before the table is written out, which is why a heading spanning two columns still lines up with the data beneath it.

What does carry over is how a cell reads. Values arrive formatted the way Excel displays them rather than as raw stored numbers: a currency cell keeps its symbol and thousands separators, a percentage keeps its sign, a date keeps its formatted form. That is the useful choice, because the displayed string is what a reader of the resulting document needs. Everything decorative has nowhere to go — fills and font colours, conditional formatting, column widths, frozen panes and filters all end at the table border, because a Markdown table has no syntax for any of them.

What is preserved

One table per worksheet, in workbook order
Sheet names as headings
Computed cell values
Number, currency, percentage and date formatting as Excel displays it
Merged cells, as spans
A leading header row, as the Markdown table header

What is lost

Formulas — only the value they computed reaches the output
Cell styling, fills and conditional formatting
Column widths, frozen panes and filters

Known limitations

Macro-enabled workbooks (.xlsm) convert identically with macros ignored, and the binary .xlsb variant reads through the same parser as .xlsx. Password-protected workbooks are encrypted and are refused. Very large sheets produce very wide Markdown tables, which are valid but awkward to read.