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UpSum has officially ceased operations, with its domain completely inactive and failing DNS resolution. The development team has abandoned the project, leaving the AI summarization platform permanently offline.
经核查 upsum.io 当前无法正常提供服务或返回服务器报错，已暂停外链直跳。
AI 摘要工具中目前正常运营的已核验工具，按近期访问量与编辑评分排序。
PDF Summarizer is an AI document assistant that lets you upload PDFs and other files, then chat with them to get summaries, key points, detailed overviews, notes, flashcards, and quizzes. You can add several documents to one conversation, ask questions across them, request answers in any language, and click through to the source passage in a side-by-side view instead of reading every page yourself.
#2UpSum was developed as an AI-powered document intelligence platform tailored for students, researchers, and professionals handling heavy reading workloads. By integrating advanced large language models, the tool enabled users to upload bulky PDF files and text documents, automatically extract core summaries, and converse directly with their files through an interactive chat interface to accelerate research.
Since UpSum is no longer accessible, explore the top-rated AI summarizers and document analysis tools featured on OpenAITools.app to find reliable, active alternatives for your daily reading workflow.
PDF Summarizer is an AI document assistant that lets you upload PDFs and other files, then chat with them to get summaries, key points, detailed overviews, notes, flashcards, and quizzes. You can add several documents to one conversation, ask questions across them, request answers in any language, and click through to the source passage in a side-by-side view instead of reading every page yourself.
把长篇 PDF 变成清晰摘要，并可与之对话
