01 / READER
Stay with the story.
A continuous vertical-scroll reader, with reading progress, position restoration, chapter navigation, and image preloading.
INDEPENDENT SOFTWARE PROJECT / 001
A reading
space of your own.
SUMI is a self-hosted manga reader built for people who want a more considered way to browse, organize, and enjoy their stories.
Currently in private development. Not yet publicly released.
THE ART OF LESSFIG. 01 / INK STUDY
FORM FOLLOWS FEELING墨 SUMI
01THE PROJECT
Reading deserves
room to breathe.
SUMI began as an independent software project: a manga library and reading experience that lives on your own device or trusted network, rather than a hosted service.
It brings together web-first interaction, personal library management, and compatibility with parts of the Mihon extension ecosystem. The focus is simple: make the everyday act of reading feel clear, calm, and yours.
Built by an independent developer in Taiwan.
Not a registered company or a commercial team.
Not a registered company or a commercial team.
02THE EXPERIENCE
Thoughtful essentials.
Nothing to get in the way.
Everything around
the reading.
02 / LIBRARY
Make it your library.
Organize titles into categories, manage chapters and bookmarks, and revisit your reading history.
03 / DISCOVERY
Explore your sources.
Browse and search through supported Mihon-compatible extensions and manage trusted extension repositories from the web interface.
04 / OFFLINE & CONTINUITY
Keep the chapters that matter.
Chapter downloads with folder and CBZ storage, a managed queue, scheduled updates, reading statistics, and backup / restore workflows.
Illustrations are original graphic studies, not product screenshots. Extension compatibility varies by source; SUMI does not bypass interactive browser challenges and does not support every Mihon extension.
03UNDER THE HOOD
Built for the web.
Grounded in control.
SUMI pairs a modern browser interface with a Python application core, persistent local data, and a dedicated JVM compatibility layer for supported manga extensions.
SYSTEM OVERVIEWSELF-HOSTED / WEB
01 / INTERFACEBrowserVue 3 frontend
LOCAL NETWORK
02 / APPLICATIONFastAPI coreReading · Library · Downloads · Updates
03 / DATASQLitePersonal library state
04 / SOURCESJVM sidecarCompatible extensions
Architecture simplified for illustration. SUMI runs on your own host, not on this website.
04DEVELOPMENT
Made with care.
Still taking shape.
ACTIVE PRIVATE DEVELOPMENT
SUMI has an implemented application and an ongoing development and testing workflow. The source repository remains private, and a public 1.0 release has not been announced.
01Core reader and libraryImplemented
02Extension integrationIn development
03Public release and downloadsNot available yet
The public website is a project introduction, not a hosted instance of the reader. SUMI has no built-in authentication and is intended for use only on a trusted device or network.
05CONNECT
Have a question
about SUMI?
For questions about the project, development, or potential collaboration, you can reach the independent developer directly.
founder@gugaouo.dpdns.org