About HanOpen
HanOpen turns HWP and HWPX documents into DOCX, Markdown, HTML and plain text inside your browser. This page says who builds it, why it exists, what it refuses to do and where it stops.
Why this site exists
HWP is the document format of the Hangul word processor. Korean government offices, universities, hospitals and law firms write in it every day and send it to everyone. Outside that one program the format is closed ground: the file arrives, your computer offers no preview, and text written for you is out of reach.
A student admitted to a Korean university gets the enrolment packet as .hwp. A translator is sent a source text as .hwp. A foreign resident receives a tax notice as .hwp. Someone on a Mac, an iPhone or a locked work laptop cannot install the editor. HanOpen exists for that moment: open a tool page, drop the file, and get back something your own software can read.
Operated by Tani
Tani develops and operates HanOpen. The tools are free to use without an account. The site delivers pages and program files, then document processing takes place in your browser. There is no server receiving documents for conversion.
The operator cannot see files you select in a tool. Site access logs and emails you choose to send are handled as described in the privacy policy. Use the contact page to report a problem or suggest a feature.
What it converts
HanOpen reads HWP 5.0 and HWPX files and writes four things: DOCX that stays editable in a word processor, Markdown for notes and for feeding text into other programs, HTML for reading and printing, and plain text when only the words matter. A viewer shows a document without converting it, and two side utilities cover neighbouring Korean file problems.
What it will not convert
Some files are refused on purpose. A distribution document is one the author saved with editing and copying restricted; password protected and DRM documents are the same kind of case. HanOpen detects all three, stops, and does not remove the protection. If you need such a file in another format, ask the person who sent it for a copy saved without the restriction.
HWP 3.x files from the Hangul 97 era are out of scope. OLE objects and charts get a placeholder rather than being redrawn, tracked changes and vertical writing are not carried across, and an equation is kept as its original script text rather than rebuilt.
The limit worth knowing about
HanOpen does not reproduce the page layout of the original. Where a line wraps, where a page breaks and where a floating box sits depend on the fonts installed and the program doing the drawing, so a converted document beside its source will look different. What it keeps is content and structure: paragraphs and character styles, tables including merged cells, footnotes, images, numbering and lists.
Because that promise has edges, every conversion ends with a conversion summary counting what the parser found against what the writer wrote. A simplified table or a placeholder object is visible before you pass the file on.
Independent of Hancom
HWP and HWPX are trademarks of Hancom Inc. HanOpen is an independent project and is not affiliated with, endorsed by or otherwise connected to Hancom Inc. The site contains no Hancom software; it reads the file format with a parser written for this project, using the specification Hancom published.
Measured support
You can use the document converters, viewer, ZIP filename repair and subtitle converter directly on the site. Their scope is stated on each tool page and checked with repeatable tests and a recorded document corpus. A working download does not guarantee that every layout or document feature was reproduced. Review the conversion summary and compare important details with the original before using the result.
Specification notice
본 제품은 한컴의 HWP 문서 파일(.hwp) 공개 문서를 참고하여 개발하였습니다.
This product was developed with reference to the public documentation of the Hangul word processor file format (.hwp) released by Hancom Inc.