Mebox

Mebox is a clip finder tool. A free Chrome extension that clips precise segments from YouTube and Bilibili, saves whole videos in one click, generates subtitle screenshots from marked ranges and organizes saved moments in a side panel with LLM summaries and looping cover previews.

Mebox is a browser extension built around one narrow, practical job: pulling short, precisely bounded clips out of long videos on YouTube and Bilibili. Instead of re-watching an hour of footage to find a thirty second passage, the user marks a start point and an end point, presses Save, and the segment is kept for later. The same Save control also grabs the entire video when the full length is what matters, so the workflow does not change based on clip size. The feature set leans toward speed over editing power. Flash Save is aimed at the moment a useful idea appears mid-video: one action captures the key passage before attention moves elsewhere. A second feature converts a marked segment into a series of screenshots with the subtitles attached, producing a compact visual summary of what was said rather than a video file to scrub through. Saved items live in a side panel, where each card carries a cover image and an LLM written summary, and hovering over a card loops the exact moment it represents, which makes scanning a library of clips far faster than opening each one. The intended audience is people who consume long form video as research material: students reviewing lectures, analysts tracking commentary, writers collecting quotes, and anyone who keeps returning to the same handful of passages. The extension installs either from the Chrome Web Store or manually through the browser's developer mode, where an unpacked package is loaded from a local folder. A Discord server and a WeChat group serve as the feedback channels. Compared with full video editors, Mebox trades timeline control and export options for immediacy, and it is not a tool for producing polished content. Compared with generic download utilities, it adds the granular start and end selection, subtitle screenshots and a searchable panel of saved moments. Clips are stored on the computer for offline access rather than in a shared cloud library.