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A file merging workspace
The most direct concept is a browser tool where office workers, students and freelancers drop in several PDFs, images or spreadsheets and receive one organized file. The first offer could focus on PDFs: reorder pages, preview the result, remove unwanted sheets and download a single document. The name fits because 'fuse' describes the outcome and 'this' matches the drag-and-drop moment, when someone points at the pile of files on their screen and asks for them to become one. It could later extend to batch jobs and saved merge presets for recurring paperwork.
