Ech0 is a self-hosted personal microblog that gives you a public timeline of short posts, links, and media on your own domain, with no ads, algorithms, or subscription in the way. Write in a Markdown editor with live preview, organize posts with tags, and let links and GitHub projects unfurl into rich cards while Bilibili and YouTube videos play inline. Attach images, audio, and video to any post, browse them in an inline gallery with built-in players, and manage uploads in a visual file manager. Visitors can like, share, and comment, you moderate from the panel with captcha protection, and RSS lets readers follow without an account. Sign in with passkeys, OAuth2, or OIDC, issue scoped access tokens, and run extra accounts under Owner, Admin, and regular roles. Media can sit on local disk or any S3-compatible bucket, and snapshots, scheduled backups, and portable capsules move the whole timeline to another instance or compile it into a static site. Ech0 Copilot recaps recent posts in one click and lets you chat with your own archive, while an MCP server, webhooks, and a documented API connect AI assistants and automations. Follow live logs in a web console, administer from a terminal UI or CLI, and install it as a PWA with dark mode and multiple languages. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.