Convert XLSX to HTML

Convert XLSX to HTML instantly in your browser. Your spreadsheet data is processed on your device and never uploaded.

Your file never leaves your device.

How to convert XLSX to HTML

An HTML table can be pasted into a website, a CMS or an email. This tool reads the XLSX with SheetJS, a proven spreadsheet engine, directly in your browser and writes a correct HTML file with the right encoding, escaping and structure. There are no rows to copy by hand and no data leaves your computer.

Step 1: Choose your XLSX file
Drag and drop a .xlsx, .xlsm, .xlsb file onto the converter or click to browse. It works on desktop, tablet and phone.
Step 2: Automatic conversion
Rows and columns are read and written as HTML in a fraction of a second.
Step 3: Download the HTML
Save each result individually, or download everything as a single ZIP when you convert several files.

Good to know

Cell values are exported as displayed; formulas are replaced by their calculated results.
Each sheet is exported in order, so multi-sheet workbooks keep all their data.

Why use this XLSX to HTML converter?

An HTML table can be pasted into a website, a CMS or an email.
Handles large files with thousands of rows.
Correct quoting and UTF-8 encoding.
100% local: spreadsheets often contain personal or financial data, and here it never leaves your device.

Is it free?

Yes. Converting XLSX to HTML is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device.

Is my file uploaded?

The XLSX file is processed entirely in your browser. It is never uploaded, never stored and never seen by anyone, so this is safe for confidential files.

About the formats

What is XLSX?

XLSX (Excel Open XML) is the standard spreadsheet format from Microsoft Excel, also supported by Google Sheets and LibreOffice Calc. Data is organised into cells and sheets, with support for formulas, functions, charts and formatting. Because the file is a ZIP container of XML, its content stays readable and easy to process.

Use XLSX for tabular data that needs structure and calculation, budgets, inventories, lists and anything with formulas or multiple sheets. When you only need the raw data, you can export a single sheet to CSV or JSON here.

Excel Spreadsheet (XLSX)

What is HTML?

HTML (HyperText Markup Language) is the markup language used to structure web pages, defining headings, paragraphs, links, images and more. Every website you visit is built on HTML. It is plain text that a browser interprets and renders into the page you see.

Use HTML whenever you publish content on the web, pages, articles, emails or anything meant to be read in a browser. It is also the destination format when converting a text document into a web page.

HTML (HyperText Markup Language)

Frequently Asked Questions

Is XLSX to HTML conversion free?

Yes. It is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device.

What happens to formulas when converting XLSX to HTML?

The calculated values are exported. The formulas themselves are not part of the output format.

Is it safe to convert xlsx to html here?

Yes. The work happens on your own device with WebAssembly and browser APIs, so the file is not uploaded at all. You can even disconnect from the internet once the page has loaded.

Do I need to install anything?

No. Everything runs in a modern browser (Chrome, Edge, Firefox or Safari) on Windows, macOS, Linux, Android and iOS. There is no app, plugin or account.

ExcelProcessed locally