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Free AI summarizer vs ChatPDF

Both are free to try without an account. ChatPDF is a place you upload a PDF into and chat with it. Our free summarizer is one-shot: paste an article URL or upload a document — PDF, Word, PowerPoint and more — and get the key points in seconds, with nothing stored. Here's an honest look at which fits when.

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What you actually get

One-shot key points, or a PDF you chat with.

The free Sidenote summarizer

Paste an article URL or upload a PDF, Word, PowerPoint, text, Markdown or RTF file (up to 4 MB) and get the key points in seconds. No account, no card, nothing stored. Being free, it's rate-limited by IP with a small daily cap, and very long documents are summarized from their first portion.

ChatPDF

An upload-first PDF chat tool: paste a PDF and start asking questions without making an account — the lowest-friction way to chat with a one-off file. A paid plan sits above the free tier, and there are native iOS and Android apps plus study extras like flashcard and slide generators.

Compared honestly

Free summarizer vs ChatPDF, side by side.

CapabilityFree summarizerChatPDF
Summarize a web article, not just a PDF Yes No
Upload a PDF Yes Yes
No-login free tier Yes Yes
Chat back and forth with the PDF No Yes
Flashcards & study extras No Yes
Mobile apps No Yes

Three rows go to ChatPDF, and we're not pretending otherwise — for an ongoing conversation with one PDF, it's the better fit. Comparing ChatPDF with the full Sidenote extension is a different story: see Sidenote vs ChatPDF.

The short answer

When to use which.

Use the free summarizer when…

You want key points, not a conversation — from a web article by URL or a mixed bag of files: PDF, Word, PowerPoint, Markdown. Paste, read, done, with nothing stored afterwards.

Use ChatPDF when…

You want to keep asking one PDF questions, like flashcards and other study extras, or read on your phone with its native apps. For back-and-forth chat with a single PDF, ChatPDF is the stronger free tool — ours is one-shot by design.

Want to chat with PDFs andeverything else you read — with citations that scroll to the exact passage? That's the Sidenote extension — see Sidenote vs ChatPDF or head back to the free AI summarizer.

FAQ

Free summarizer vs ChatPDF — common questions

Shape. ChatPDF is a place you upload a PDF into and chat with it there — back-and-forth questions about that file. Our free summarizer is one-shot: paste an article URL or upload a document (PDF, Word, PowerPoint, text, Markdown or RTF) and it hands you the key points, keeps nothing, and that's it.
No — it gives you the key points once, by design. If you want a conversation about a single PDF, ChatPDF is built for exactly that. If you want cited answers — where every claim links to the exact passage and clicking it scrolls the document there — that's the Sidenote extension.
Not really — ChatPDF works on PDFs: files you upload or public PDF URLs it can fetch on its own servers. Web articles, live web pages and anything behind a company login are out of reach. The free summarizer takes any public article URL as well as uploaded files, and the Sidenote extension reads whatever page you have open in your browser.
Not by our free tool. It extracts the text, summarizes it, and keeps nothing — there's no account and the file isn't saved.
Yes — being free and login-free, it's rate-limited by IP: a couple of runs a minute and a small daily cap, and the tool shows you how many free summaries you have left today. Very long documents are summarized from their first portion.
No sign-up needed

Key points. In seconds.

Paste a link or drop in a document and the free summarizer hands you the key points — or add Sidenote to Chrome for answers that cite the exact passage.

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