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Free AI summarizer vs Perplexity

Perplexity starts from a question and searches the open web for the answer. Our free summarizer starts from a document you already have — paste an article URL or upload a file and get its key points in seconds, no account, no prompt. Here's an honest look at which fits when.

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What you actually get

A summary of your document, or an answer from the web.

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.

Perplexity

An answer engine for the open web — ask it anything and it searches public sources, summarises what it finds, and links out to them. It's excellent at discovery and live, up-to-date research, with mobile apps and open-ended creative features. It can read PDFs you upload, though pages behind a company login are invisible to it.

Compared honestly

Free summarizer vs Perplexity, side by side.

CapabilityFree summarizerPerplexity
Key points from one document — no question to phrase Yes No
Upload a PDF, Word or PowerPoint file Yes Partial
Summarize the specific article you give it Yes Partial
Search & discover across the open web No Yes
Live, up-to-date answers with follow-ups No Yes
Mobile apps No Yes

Three rows go to Perplexity, and we're not pretending otherwise — it searches the whole web; our free tool reads one document. Comparing Perplexity with the full Sidenote extension is a different story: see Sidenote vs Perplexity.

The short answer

When to use which.

Use the free summarizer when…

You already have the article or document — a link a colleague sent, a PDF on your desktop — and you just want its key points fast, with no account and nothing stored.

Use Perplexity when…

You have a question, not a document. It searches the open web, surfaces sources you didn't know existed, and follows up with live, up-to-date results. For research and discovery across the internet, Perplexity is the stronger tool — ours doesn't search at all.

Want answers from your own documents with citations that scroll to the exact passage? That's the Sidenote extension — see Sidenote vs Perplexity or head back to the free AI summarizer.

FAQ

Free summarizer vs Perplexity — common questions

Direction. Perplexity is an answer engine — you ask a question and it searches the public web, reads what it finds, and summarises it with links to the sources. The free summarizer starts from a document you already have: paste one article URL or upload one file and it gives you that document's key points, nothing more.
No. It only reads the one URL or file you give it — it doesn't search, discover or follow up. For open-ended research across the internet, Perplexity is the right tool.
Partially — it can read PDFs you upload, but it's built as an open-web answer engine, and a page behind your company login is invisible to it. The Sidenote extension reads private pages in your browser on your own session, and the free summarizer handles any public URL or uploaded file up to 4 MB.
No — it gives you plain key points from the one document you gave it. Perplexity cites public web pages and links out to them. The Sidenote extension goes a step further on your own documents: every answer cites the exact passage, and clicking the citation scrolls the document to it.
Yes — no account, no card. Because it's free it's rate-limited by IP with 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.
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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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