SXW to DOCX Converter

Convert SXW to DOCX online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

or drag and drop files here

Maximum file size is 1GB

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an SXW file?

An SXW file is a legacy text document format associated with Sun Microsystems' StarOffice and the early versions of OpenOffice.org Writer (prior to version 2.0). It relies on the OpenOffice.org XML format, structuring data within a ZIP-compressed archive that contains XML files defining text, styles, and settings. This format was the direct technical precursor to the ISO/IEC 26300 OpenDocument Format (ODT) and shares a similar XML-based architecture, making it highly compressible and open for parsing.

How to open an SXW file

Native support for SXW is absent in default OS installations but is standard in open-source office suites. LibreOffice Writer and Apache OpenOffice are the recommended applications for opening and converting SXW files to modern formats like ODT or DOCX. Microsoft Word can usually open these files if the appropriate ODF converters or compatibility packs are installed, though layout discrepancies may occur.

SXW Technical Info

Full Name: OpenOffice.org XML Text Document
Developed By: Sun Microsystems
Initial Release: 2000
MIME Type: application/vnd.sun.xml.writer

What is a DOCX file?

The DOCX format is the default document standard for Microsoft Word 2007 and newer, based on the Office Open XML (OOXML) specification standardized under ISO/IEC 29500 and ECMA-376. It functions as a compressed ZIP container that packages separate XML files (such as document.xml, styles.xml, and settings.xml) alongside media assets. This modular XML architecture allows for improved data recovery and smaller file sizes compared to legacy binary DOC files, while explicitly prohibiting the storage of VBA macros.

How to open a DOCX file

DOCX is natively supported by Microsoft Word 2007+ on Windows and macOS. Due to its status as an ISO standard, it has broad compatibility with non-Microsoft ecosystem tools; it can be opened and edited by Apple Pages, Google Docs, LibreOffice Writer, and Apache OpenOffice. Furthermore, because it is a ZIP archive, users can rename the extension to .zip to extract and inspect the internal XML structure and embedded media assets manually.

DOCX Technical Info

Full Name: Word Open XML Document
Developed By: Microsoft
Initial Release: 2006
MIME Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert SXW to DOCX in seconds

Every SXW to DOCX conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert SXW to DOCX via API

Automate SXW to DOCX conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "sxw-to-docx",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "docx"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.sxw

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.