Ttukttak

Ttukttak

Open Source & Fonts

This product was developed with reference to Hancom’s published HWP document-file specification.

  • Document engine rhwp (MIT)
  • Pretendard, Noto Sans KR, Nanum Myeongjo (OFL)
  • Lucide icons (ISC)

Document engine

rhwp — Copyright (c) 2025-2026 Edward Kim, MIT License. github.com/edwardkim/rhwp

This product was developed with reference to Hancom’s published HWP document-file specification.

“Hangul” and “HWP” are trademarks of Hancom Inc.; Ttukttak is an independent app not affiliated with Hancom.

Fonts

Pretendard — SIL Open Font License 1.1

Noto Sans KR — SIL Open Font License 1.1

Nanum Myeongjo — SIL Open Font License 1.1

Icons and libraries

Lucide — ISC License

Full license texts for Flutter and the packages used are in the app under Settings › Open source & font licenses.