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Spreadsheet to HTML Table

Turn the first sheet of an Excel or CSV file into a ready-to-paste HTML table — in your browser.

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Quick Answer

The Spreadsheet to HTML Table reads an Excel or CSV file and outputs the first sheet as a clean HTML table you can download and paste into a web page or email. It uses SheetJS to parse the file; formulas come through as their computed values and cell formatting is dropped. It handles the first sheet only and runs entirely in your browser.

What the Spreadsheet to HTML Table Does

It converts a spreadsheet's first sheet into an HTML table — the markup you would paste into a web page, a newsletter or a CMS.

SheetJS reads the workbook and generates the table rows and columns, including any merged-cell spans, as a downloadable HTML file.

How It Works

SheetJS parses the uploaded .xlsx, .xls or .csv into a workbook, then takes the first sheet.

It generates an HTML table from that sheet — with the correct rows, columns and merged-cell spans — and gives it to you as an .html file.

Data source & conversion logic

  1. Drop a spreadsheet. Select an .xlsx, .xls or .csv file; it is read in your browser.
  2. Parse with SheetJS. SheetJS reads the file into a workbook of sheets.
  3. Take the first sheet. It uses the first sheet and converts it to an HTML table.
  4. Output the HTML. It downloads the table as an .html file, ready to paste.

Privacy

Your spreadsheet is parsed entirely in your browser with SheetJS. Nothing you upload is sent to a server, stored or logged.

There is no account or history; closing the tab clears the file, so it is safe for confidential data.

Technical Details

Input.xlsx, .xls or .csv
LibrarySheetJS (in-browser)
ReadsFirst sheet only
FormulasShown as computed values
FormattingDropped (plain table)
OutputAn .html table file
Processing100% in-browser

Standards & references

  • Office Open XML (XLSX) — the .xlsx spreadsheet format, standardised as ECMA-376 and ISO/IEC 29500. SheetJS also reads the older .xls and plain .csv.
  • SheetJS — the in-browser library that parses the workbook and emits the HTML table.
  • HTML table — the output is a standard HTML table, so it renders in any browser, email client or CMS that allows table markup.

Accuracy & Limitations

It converts the first sheet only. A multi-sheet workbook gives just sheet one — use the Excel Sheet Splitter to get the others.

Formulas come through as their last computed values, not as live formulas.

Cell styling — colours, fonts, borders and column widths — is dropped. The output is a plain HTML table, which you can style with your own CSS.

Merged cells are preserved using colspan and rowspan, and dates may appear as serial numbers depending on how the cell was stored.

Real-World Use Cases

Embedding data in a web page

Paste the generated table straight into a page or article.

Putting a table in an email

Drop a clean HTML table into a newsletter or message.

Turning a CSV into HTML

Convert a comma-separated file into table markup without a spreadsheet app.

Sharing a sheet as a view

Give someone a viewable table instead of a file to open.

When to use it — and when not to

Good for

  • The first sheet as an HTML table
  • Embedding spreadsheet data in a page or email
  • Quick HTML from a spreadsheet or CSV
  • A plain table you will style yourself

Not the best choice for

  • Multiple sheets at once
  • Keeping cell colours, fonts or widths
  • Live formulas
  • Very large sheets

For every sheet as CSV, use the Excel Sheet Splitter; for the first sheet as JSON, use Excel to JSON; to just view a CSV as a table, use the CSV Viewer.

Frequently Asked Questions

What does the spreadsheet to HTML table tool do?
It reads an Excel or CSV file and outputs the first sheet as a clean HTML table you can download and paste.
Which file types can I upload?
Excel .xlsx and .xls files, and plain .csv files. SheetJS parses all three.
Does it convert every sheet?
No. It converts the first sheet only. For the other sheets as CSV, use the Excel Sheet Splitter.
Do formulas carry over?
As values, not formulas. You get each cell's last computed result, not the formula behind it.
Is cell formatting kept?
No. Colours, fonts, borders and widths are dropped. The output is a plain HTML table you can style with CSS.
Are merged cells handled?
Yes. Merged cells are output using colspan and rowspan so the layout matches the sheet.
Why do some dates show as numbers?
Depending on how the cell was stored, a date can appear as its underlying serial number rather than a formatted date.
Is my spreadsheet uploaded?
No. It is parsed entirely in your browser with SheetJS; nothing is sent to a server.
Can I style the table?
Yes. It is standard HTML, so you can add your own CSS for borders, spacing and colours.
What is the output file?
An .html file named after your spreadsheet, containing the table markup.
How is this different from the CSV Viewer?
The CSV Viewer shows a table on screen for reading; this tool exports the first sheet as an HTML file you can reuse.
Is it free?
Yes, completely free with no sign-up and no limits.

References

Documented against this tool's own code: it parses your file with SheetJS and exports the first sheet as an HTML table — so the page is clear it is first-sheet only, with formulas as values and formatting dropped.

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