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spreadsheet → document

Convert XLSX to HTML

Convert XLSX to HTML in seconds. Free, no signup, no watermark, no file-size limit. Your file is processed in your browser and never uploaded.

At a glance

Source
XLSX
Target
HTML
Where it runs
Your browser
Cost
Free, unlimited
Account
Not needed
XLSX

Converter

XLSX to HTML

On device

Drop one or more excel workbook files.

or select excel workbook

Your file never leaves this browser

    The details

    What happens when you convert a spreadsheet to text

    Microsoft Excel's modern spreadsheet. A workbook of sheets, formulas and formatting. The active sheet is flattened into a delimited text file — one line per row, one value per column, with the first line as a header. The result is a the format the web is built on. a document that a browser knows how to lay out, produced entirely inside your browser.

    What survives

    • Every value in the sheet
    • The column order and the row order

    What changes

    • All formatting and number formatting — dates and currency come out raw
    • Only the sheet you choose; the others are not included

    Where it goes wrong

    • A cell containing a comma has to be quoted, and badly generated CSVs sometimes are not
    • The file is written in UTF-8, which older software may read as something else

    Why anyone would do this

    Delimited text is the one thing every import button on the internet understands.

    About the format

    Microsoft Excel's modern spreadsheet.

    A ZIP archive of XML worksheets, a shared string table, styles and the formula definitions for each cell.

    Where it is good
    • Full formulas, formatting, charts and multiple sheets
    • Opens in Excel, Google Sheets, LibreOffice and Numbers
    • Data validation and conditional formatting survive
    Where it falls short
    • Formulas written by third-party tools sometimes need a recalculation
    • One stray cell can hold a link to a file that no longer exists
    • Very large workbooks are slow to open anywhere
    You will find it on
    Excel, Google Sheets, LibreOffice Calc, Numbers

    The thing people miss

    A workbook with a million rows of formatting but no data can be larger than one with all the data and no formatting.

    About the target

    The format the web is built on.

    A tree of elements and attributes, usually with CSS for styling and JavaScript for behaviour. The browser builds the page from it at request time.

    • Reflows to any screen size on its own
    • Semantic markup makes a document readable by a screen reader
    • Links, images and forms are all part of the format

    Real jobs

    What people are actually doing with XLSX

    Sending a report that still calculates

    Turning a table into a document a client can read

    Moving a workbook between Excel and Google Sheets

    Specification

    The details, in one table

    Source formatXLSX — Excel workbook
    Target formatHTML — HTML document
    Typical source size20 KB – 20 MB
    RunsIn your browser
    Account neededNo
    WatermarkNone
    File extension.xlsx → .html .htm

    How to

    XLSX to HTML, step by step

    1. 01

      Add your excel workbook

      Drag the file onto the drop zone, or tap to browse. Only one file is needed.

    2. 02

      Choose the HTML settings

      Set the HTML-specific options — everything happens locally, so the speed is your device, not a queue.

    3. 03

      Download the result

      The finished HTML downloads to your device. Nothing is uploaded and nothing is retained.

    Also available

    XLSX converts into

    PDFPDF documentCSVComma separated valuesTXTPlain text

    Questions

    XLSX conversion questions

    What actually happens to my XLSX file when I convert it to HTML?

    The active sheet is flattened into a delimited text file — one line per row, one value per column, with the first line as a header. So the XLSX file is unpacked, the content is laid out, and the result is written out as HTML. Every value in the sheet survives unchanged.

    Will converting XLSX to HTML reduce the quality?

    For this particular conversion, not in the way you would expect. Every value in the sheet — the XLSX content is not re-encoded in a lossy way. The only thing that changes is the format it is stored in.

    Is my XLSX file uploaded to a server?

    No. This XLSX to HTML conversion runs as JavaScript inside your browser tab. The file is read from your device and the result is written back to your device, so there is no upload step, no file-size limit and no copy of your XLSX file on any server.

    Do I need an account or will there be a watermark?

    Neither. There is no sign-up step, no email capture and no watermark on the output. The only limits are the ones your own device imposes.

    What is the most common mistake people make when converting XLSX to HTML?

    A cell containing a comma has to be quoted, and badly generated CSVs sometimes are not

    Why would somebody convert XLSX to HTML at all?

    Delimited text is the one thing every import button on the internet understands. In short: sending a report that still calculates

    Something most people do not know about XLSX?

    A workbook with a million rows of formatting but no data can be larger than one with all the data and no formatting.