Atsumeru is a free, open-source, self-hosted media server for organizing, managing, and reading manga, comics, and light novels collections across multiple devices.

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🚀 Overview

Atsumeru (集める, meaning 'to collect') is a dedicated self-hosted media server for manga, comics, and light novels enthusiasts. It streamlines the organization of digital libraries into customizable categories, enables precise metadata editing, and provides seamless reading experiences via native desktop and mobile apps with synchronized history.

This project solves the problem of efficiently cataloging and accessing large personal media collections without relying on cloud-based services, ensuring privacy, full data control, and advanced features like multi-user support. It's built for collectors who demand powerful organization tools, metadata flexibility, and cross-platform compatibility.

Developed to offer a specialized alternative to general-purpose media servers, Atsumeru focuses on the unique needs of manga/comics/LN users, with easy self-hosting via JAR or Docker and extensible REST API.

• What problem does this project solve? Managing and organizing niche media libraries with metadata control and device sync in a self-hosted environment.
• Who is it built for? Manga, comics, and light novel collectors and self-hosting fans.
• Why did you build it? To provide a free, open-source tool tailored for these media types with superior organization and reading features.

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✨ Key Features

• Library organization with Autocategories, Custom categories, and Metacategories for intuitive sorting.
• Metadata editing/parsing from ComicInfo.xml, book_info.json, or online catalogs.
• Native reading apps for Windows/Linux/macOS/Android with two-way history sync and series downloads.
• Multi-user accounts with access controls and separate reading histories.
• REST API with Swagger UI for custom integrations.
• Support for CBZ/CBR/CB7, PDF, ePub/FB2/DjVu (limited), and more.
• Optional: Docker deployment and ongoing format improvements.

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🛠 Tech Stack

• Backend: Java, Spring Boot, Gradle
• Desktop Client (Manager): Java
• Mobile Client: Android (Kotlin/Java)
• API: REST/Swagger UI
• Deployment: Docker, self-hosted JAR
• Database: File-based/embedded (not specified)
• Auth: Custom multi-user system
• Hosting: Self-hosted (e.g., VPS, local server)

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👥 Who Is This For?

This project is useful for:

• Manga/comics/light novel collectors who want self-hosted library management
• Self-hosting enthusiasts building personal media stacks
• Readers needing metadata tools and cross-device sync

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📸 Screenshots / Demo

• Live demo: https://atsumeru.xyz (documentation and guides; self-host for full demo)
• GitHub: https://github.com/Atsumeru-xyz/Atsumeru

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes / Open Source (Fully free, MIT licensed, no costs involved.)

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Is the source code available?

Yes — https://github.com/Atsumeru-xyz/Atsumeru (server), https://github.com/Atsumeru-xyz/AtsumeruManager (desktop), https://github.com/Atsumeru-xyz/AtsumeruAndroid (mobile), and more in org.

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Can I contribute?

Yes — Open issues/PRs on GitHub repos, provide feedback via Telegram channels, or help with translations/docs.

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📬 Contact & Links

• Website: https://atsumeru.xyz
• GitHub: https://github.com/Atsumeru-xyz
• Telegram App Channel: https://t.me/atsumeru_app
• Telegram Discussion: https://t.me/atsumeru_talk

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