Free online tool

ODS to HTML converter

Convert OpenDocument spreadsheets to HTML tables instantly — right in your browser.

Your file never leaves your device

📊

Drop your .ods file here

or click to browse · .ods files only

Converting…

Converted:

Want to convert another file?

How it works

Private, fast, free

No uploads, no accounts, no limits. Conversion runs entirely in your browser.

🔒 Fully private

Your ODS file is read locally by your browser. No data is sent to any server. Works offline after the page loads.

⚡ Instant conversion

Conversion runs in milliseconds using odf-kit's pure JavaScript reader. No waiting for upload or server processing.

📋 Clean HTML output

Each sheet becomes an HTML table. Cell values, merged cells, and basic formatting are all preserved in the output.

🆓 Free, always

No file size limits, no conversions per day, no sign-up required. Powered by open source odf-kit.

Need ODS → HTML in your app?

odf-kit is a free, open source JavaScript library. odsToHtml() converts any .ods file to an HTML string in Node.js or the browser. No server, no LibreOffice.

View documentation npm install odf-kit

// The same code powering this tool
import { odsToHtml } from "odf-kit/ods-reader";

const bytes = new Uint8Array(await file.arrayBuffer());
const html = odsToHtml(bytes);

// html → string with one <table> per sheet