Convert LibreOffice Writer to Clean HTML
LibreOffice Writer paste HTML includes P and T-prefixed CSS class names, inline styles with metric units, and legacy formatting attributes. Publish Helper strips the LibreOffice artifacts for standards-compliant HTML output.
LibreOffice generates HTML with auto-generated class names (P1, P2, T1, T2), embedded <style> blocks with these classes, inline styles using centimeter-based measurements, and legacy HTML attributes like align and valign on table elements.
- Auto-generated CSS classes (P1, P2, T1, T2, T3)
- Embedded <style> blocks with class definitions
- Metric-based measurements (cm instead of px or rem)
- Legacy HTML attributes (align, valign, width)
- Non-semantic span wrappers for every text run
LibreOffice Writer Output
<p class="P1"><span class="T1">Introduction</span></p> <p class="P2"><span class="T2">This is a paragraph with </span><span class="T3">bold text</span><span class="T2"> and </span><span class="T4">italic text</span><span class="T2">.</span></p>
Clean HTML
<h2>Introduction</h2> <p>This is a paragraph with <strong>bold text</strong> and <em>italic text</em>.</p>
1.Copy your content from LibreOffice Writer
2.Paste into Publish Helper and configure cleanup options
3.Click Clean HTML and copy the result
Is LibreOffice paste better than Word?
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LibreOffice paste is generally simpler than Word — no XML namespaces or conditional comments. However, it still uses auto-generated class names and embedded style blocks that need cleanup. Publish Helper handles both.
Does Publish Helper remove embedded style blocks?
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Yes. The HTML Cleanup feature with 'Remove style tags' enabled strips embedded <style> blocks and their associated class references, leaving only inline content.
Can I use Publish Helper on Linux?
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Absolutely. Publish Helper runs entirely in the browser — it works on Linux, macOS, Windows, ChromeOS, and any device with a modern web browser.
Last updated: March 2026