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HWPX to EPUB Converter

Convert HWPX to EPUB 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

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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.

01

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.

02

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.

03

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 HWPX file?

HWPX is the modern, open standard document format for Hancom Office Hangul, introduced to adhere to the OWPML (Open Word Processor Markup Language) standard, also known as KS X 6101. Unlike the binary HWP format, HWPX utilizes a ZIP-compressed container structure holding XML files to define content, styles, and metadata, conceptually similar to Microsoft's DOCX. This shift enables better data interoperability, programmatic parsing, and machine readability for big data analytics and public record archiving.

How to open an HWPX file

HWPX files are primarily opened using Hancom Office 2010 SE+ or newer iterations. Users can also utilize the Hancom Office Viewer or the cloud-based Hancom Docs service. Because HWPX is a ZIP-based XML format, the raw contents can be inspected by renaming the extension to .zip and extracting it, though proper rendering requires the Hancom engine or the Naver Whale browser's document viewer.

HWPX Technical Info

Full Name
Hangul Word Processor XML
Developed By
Hancom Inc.
Initial Release
2010
MIME Type
application/hwp+zip

What is an EPUB file?

EPUB (Electronic Publication) is an open e-book standard maintained by the World Wide Web Consortium (W3C), originally developed by the International Digital Publishing Forum (IDPF). It utilizes the Open Container Format (OCF) based on ZIP compression to package XHTML content, CSS styling, and XML metadata. EPUB supports reflowable content, allowing text to adapt to various screen sizes, and fixed-layout rendering for graphic-heavy publications. The current version, EPUB 3.2, supports HTML5, SVG, and JavaScript interactivity.

How to open an EPUB file

EPUB files require dedicated e-reader software as most operating systems do not natively render them. On desktop environments (Windows/macOS/Linux), Calibre is the industry-standard management tool, while Adobe Digital Editions handles DRM-protected files. For mobile devices, Apple Books (iOS) and Google Play Books (Android) provide native rendering. Browser-based extensions like EPUBReader for Chrome allow viewing without standalone software.

EPUB Technical Info

Full Name
Electronic Publication
Developed By
IDPF / W3C
Initial Release
2007
MIME Type
application/epub+zip

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Why RunConvert

The fastest way to convert any file

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

Convert HWPX to EPUB in seconds

Every HWPX to EPUB 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 HWPX to EPUB via API

Automate HWPX to EPUB 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": "hwpx-to-epub",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "epub"
      },
      "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.hwpx

# 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.