Documents conversion
Convert XLSX to HTML
Updated Jul 2026
XLSX is the spreadsheet format Excel saves in, and HTML is the format web pages are built from. To convert XLSX to HTML, open the spreadsheet in a converter and export it as a web page, which turns your rows and columns into a table anyone can view in a browser, no Excel needed. Doing this on your own computer keeps the spreadsheet off other people's servers.
- Extension
- .xlsx
- Type
- Documents
- Typically
- Spreadsheets
- Extension
- .html
- Type
- Documents
- Typically
- Web pages
Convert XLSX to HTML on your own computer. Nothing uploads.
How to convert XLSX to HTML
- Open Morphjet and drag in the XLSX file you want to convert. You can add a single spreadsheet or a whole folder at once.
- Choose HTML as the output format.
- Convert. The HTML file is written next to your original, and nothing leaves your machine.
XLSX vs HTML: what actually changes
| XLSX | HTML | |
|---|---|---|
| Opens everywhere | No, needs Excel or compatible spreadsheet software | Yes, opens in any web browser |
| Formulas | Yes, live and recalculate | No, only the calculated result is shown as plain text |
| File size | Compact, even with large datasets | Larger, since data is written out as text and tags |
| Editing the data | Yes, built for entering and editing | Awkward, meant for viewing, not editing |
| Multiple sheets | Yes, one file holds many sheets | Each sheet needs its own table or section |
| Charts and formatting | Fully supported | Basic formatting carries over, charts usually don't |
When to convert, and when not to
Convert XLSX to HTML when you want to publish a spreadsheet's data on a website, share a table with someone who doesn't have Excel, or drop the numbers straight into a page without asking anyone to open a spreadsheet.
Keep the XLSX original if anyone still needs to edit the data or rely on its formulas, since the HTML version only shows the numbers as they looked at export time.
Why not just use an online converter?
Spreadsheets often hold things people would rather not send to a stranger's server, budgets, salaries, client lists, unreleased numbers. An online converter uploads the whole file to convert it. Converting on your own computer means that data stays on your machine the entire time, and the HTML file lands right next to the original.
Questions
Does converting XLSX to HTML lose any data?
The values and basic layout come through fine. What doesn't carry over are live formulas, since HTML can only show the result Excel had calculated at the time of export, not the underlying formula.
Will formulas still work in the HTML file?
No. The HTML table shows the calculated numbers as static text. If someone changes a number in the table, nothing else on the page recalculates the way it would in Excel.
Can I convert a spreadsheet with multiple sheets?
Yes, though each sheet in the workbook needs to become its own table or section on the page, since HTML doesn't have a built-in concept of tabs the way Excel does.
Will charts and cell formatting show up in the HTML?
Basic formatting like column widths, bold text, and number formatting usually comes through. Charts generally don't convert, since they're a different kind of object than a table.
Can I convert XLSX to HTML without uploading the file anywhere?
Yes. A desktop app like Morphjet converts the file on your own computer, so the spreadsheet never travels over the internet. You can do it with your wifi off.
Morphjet converts XLSX, HTML, and 1,800+ other formats, all on your machine. Launching this July.