💬 与 PDF 对话（关键词检索）Chat with PDF (Keyword Search)
在 PDF 文本中检索与问题相关的句子并列出（非大模型）：自动去掉 who / what / 什么 / 哪里 等疑问词和停用词，按命中的关键词数排序。本地处理。Find sentences in the PDF that match the keywords in your question (not an LLM). Question and stop words such as who / what / the are ignored, and sentences are ranked by how many keywords they contain. Processed locally.
使用说明与常见问题How-to & FAQ
「与 PDF 对话（关键词检索）」是什么？What is the Chat with PDF (Keyword Search) tool?
在 PDF 文本中检索与问题相关的句子并列出（非大模型）：自动去掉 who / what / 什么 / 哪里 等疑问词和停用词，按命中的关键词数排序。本地处理。Find sentences in the PDF that match the keywords in your question (not an LLM). Question and stop words such as who / what / the are ignored, and sentences are ranked by how many keywords they contain. Processed locally.
如何使用「与 PDF 对话（关键词检索）」？How do I use the Chat with PDF (Keyword Search) tool?
在「与 PDF 对话（关键词检索）」中，选择或拖入文件，按需设置「问题 / 关键词」等选项，然后点击「检索」按钮即可。加密的 PDF 会提示输入密码（出现「打开密码」栏和「打开」按钮），输入密码并点「打开」后再继续。In the Chat with PDF (Keyword Search): Choose or drop your files, set "Question / keywords", then click "Search". For an encrypted PDF, the page asks for its password (a Password field and an Open button appear) — enter it, click Open, then continue.
是 ChatGPT 吗？Is this ChatGPT?
不是。只在本地按关键词检索句子，不会调用任何云端模型，也不会生成新内容。No. It only searches sentences locally by keyword — no cloud model, and it never writes new text.
问题怎么写？How should I phrase the question?
可以直接写问题，例如「Who was the first person to walk on the Moon?」或「谁发明了电话」。who、what、the、是、的、什么、哪里 等疑问词和停用词会被去掉，剩下的关键词显示在「关键词：」一行；句子按包含的关键词个数排序（相同时按出现次数，再按页码顺序），最多列出 12 句。Type a normal question such as "Who was the first person to walk on the Moon?". Question and stop words (who, what, the, is, of…) are dropped and the remaining keywords are shown on the "Keywords:" line. Sentences are ranked by how many keywords they contain (then by how often, then by page order), up to 12.
提示「未找到文字层」？"No text layer found"?
说明这是扫描件或纯图片 PDF，里面没有可检索的文字，需要先做 OCR（文字识别）再来检索。The PDF is a scan or image-only file with no searchable text. Run OCR (text recognition) on it first.
加密的 PDF？Password-protected PDFs?
选择文件后会出现「打开密码」输入框，输入密码并点「打开」即可在本地解密检索；密码不会上传。A Password field appears after you choose the file; enter it and click Open to decrypt and search locally. The password is never uploaded.
有哪些选项可以调整？What options can I adjust?
「与 PDF 对话（关键词检索）」的设置：「打开密码」可留空；「问题 / 关键词」可留空；可选文件：PDF。每次生成结果都按当前设置处理。Settings in the Chat with PDF (Keyword Search) — "Password" optional; "Question / keywords" optional; files: PDF. The result always uses the current settings.
「与 PDF 对话（关键词检索）」免费吗？需要注册吗？Is the Chat with PDF (Keyword Search) free? Do I need an account?
「与 PDF 对话（关键词检索）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Chat with PDF (Keyword Search) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.