專項更強Anthropic 的前沿 AI 工作空間,由 Claude 5.5 驅動,擅長代理式程式開發、分析與細膩寫作。
ChatPDF 每月有 1,044,477 次造訪,月增率 -3.7%,定價模式為免費增值。Zeli 每月有 56,147 次造訪,成長率 -46.8%,定價模式為免費。

Zeli mirrors the Hacker News front page and attaches an AI summary plus a key quote to every story, translating it all into seven languages. It also digests HuggingFace's daily AI papers. Free, no signup, and available as RSS, plain markdown and JSON.
| 面向/指標 | ![]() | |
|---|---|---|
| 官方網域 | chatpdf.com | zeli.app |
| 定價模式 | 免費增值 | 免費 |
| 每月造訪次數 | 104.45萬 (1,044,477) | 5.61萬 (56,147) |
| 月流量變化量 | -4.05萬 (-3.7%) | -4.93萬 (-46.8%) |
| 主要市場與市佔 | 🇺🇸 美國 (9.6%) | 🇨🇳 中國 (65.1%) |
| 每月直接造訪 | 45.78萬 | 4萬 |
| 使用者評分 | 4.2 | 4.3 |
| 支援平台 | 網站 | 網站 |
與任何 PDF、影片或網頁對話,幾秒內取得附引用的答案
每則回答都錨定來源文件,附可點擊引用並自動捲動至特定段落,核對只要幾秒,不必逐頁翻找。
將文件歸入資料夾,在同一個對話中查詢多個檔案,方便比較論點、交互核對結論或一次複習整門課程。
把冗長的論文、報告與合約濃縮成重點,也支援以任何語言翻譯或提問——甚至可用一種語言上傳、另一種語言提問。
依素材自動產生單字卡與簡報,並使用內建 AI 寫作與 AI 偵測功能來起草與檢查學術文本。

Zeli mirrors the Hacker News front page and attaches an AI summary plus a key quote to every story, translating it all into seven languages. It also digests HuggingFace's daily AI papers. Free, no signup, and available as RSS, plain markdown and JSON.
Each story carries a short summary generated from the linked article plus a standout key quote, so you can judge relevance before clicking through.
The whole feed — titles, summaries and top comment highlights — is available in English, Chinese, Japanese, Korean, German, Spanish and Russian.
Every day gets a permanent page containing every story that hit the front page, retrievable long after the feed has moved on.
Daily AI papers are surfaced with translated titles and AI summaries, making Zeli a research reader as well as a news reader.
專項更強Anthropic 的前沿 AI 工作空間,由 Claude 5.5 驅動,擅長代理式程式開發、分析與細膩寫作。
免費 / 開源Completely free PDF reading and editing tool with AI assistant, though basic compared to dedicated platforms.
跨裝置的免費 AI PDF 編輯、轉換與閱讀工具

Combines full desktop PDF editing software with AI chat, but requires software installation for full features.
Summarizer.org is a free AI summarizer that condenses text, articles, essays and documents into paragraph or bullet-point summaries with adjustable length.
Summarizer.org is a free AI summarizer that condenses text, articles, essays and documents into paragraph or bullet-point summaries with adjustable length.
具備強大的多格式文件聊天與填表功能,但介面感覺稍微凌亂了一點。
Paper Digest is an AI research platform that summarizes literature, generates literature reviews with citations, and delivers daily digests of new papers across arXiv, PubMed, bioRxiv and major conferences. Launched in 2018 and used by millions of researchers, it combines a citation-backed review engine that avoids inventing results with tools for reading PDFs, writing, question answering, claim verification and topic tracking.
Paper Digest is an AI research platform that summarizes literature, generates literature reviews with citations, and delivers daily digests of new papers across arXiv, PubMed, bioRxiv and major conferences. Launched in 2018 and used by millions of researchers, it combines a citation-backed review engine that avoids inventing results with tools for reading PDFs, writing, question answering, claim verification and topic tracking.

TLDR This is a free online summarization tool that condenses long articles, blog posts, and webpages into short, easy-to-read summaries. Built as both a web app and a browser extension, it also strips ads and clutter, extracts key metadata like author and date, and estimates reading time so you can get the gist without the noise.
TLDR This is a free online summarization tool that condenses long articles, blog posts, and webpages into short, easy-to-read summaries. Built as both a web app and a browser extension, it also strips ads and clutter, extracts key metadata like author and date, and estimates reading time so you can get the gist without the noise.