8 PDF Summarizer Chrome Extensions Compared

If you want a Chrome extension that summarizes a PDF with one click, Gist AI is the simplest free option. To chat with a PDF, look at Smallpdf, AskYourPDF or PDF.ai. For research papers, Scholarcy and ResearchWize are built for academic sources, and ResearchWize reads scanned PDFs with OCR. TubeOnAI (our own tool) suits people who summarize PDFs alongside YouTube videos, web pages and podcasts, and then want to turn them into notes or posts.

We checked each extension’s Chrome Web Store listing and pricing page on October 27, 2026. Pricing below is as of October 2026, and we note which listings haven’t been updated in a long time. For other ways to speed up your browser work, see our list of AI Chrome extensions for productivity.

PDF Summarizer Extensions at a Glance

The 8 Extensions in Detail

TubeOnAI

TubeOnAI is our product, so read this entry with that in mind. It’s a general AI summarizer and content repurposer, not a PDF-only tool. The extension summarizes PDFs, web pages and YouTube videos. The web app also handles podcasts, Google Docs, Google Slides, Google Drive files and uploaded media. After summarizing, you can chat with the document using Ask Follow-Ups, translate the summary into 30+ languages, listen to it as audio, or turn it into a blog post, X thread, LinkedIn post or newsletter with 150+ repurposing templates.

Pros

• One tool for PDFs, videos, podcasts and articles, so your summaries live in one place, organized into Collections.
• Ask Follow-Ups lets you question the document instead of rereading it.
• Repurposing turns a PDF summary straight into content, a plus for creators and marketers.
• Summaries can be played as audio, which helps when you’re multitasking.

Cons

• The free Starter plan is credit-limited (400 credits), so heavy PDF users will need a paid plan.
• Text-to-audio, repurposing and Collections are part of the Pro plan.
• It’s built as a general summarizer, not a specialist academic tool like Scholarcy.

Availability: Chrome extension, web app, iOS and Android.

Pricing (as of October 2026): Starter free (400 credits). Essential $9/month, Pro $19/month, Enterprise $29/month, or $80, $170 and $260 a year. Paid plans have a 7-day free trial. See pricing.

Gist AI

Gist AI is a ChatGPT-powered extension built for speed. One click pulls the key points from a web page, a YouTube video or a PDF, whether online or saved on your device. Its listing says there are no limits on PDF size, page count or number of summaries.

Pros

• Free and simple, with no API key needed.
• Handles online and local PDFs, with no stated page limit.
• A “Read more” feature traces a summary point back to its source in the document, or to the moment in a video.
• Summaries can be translated into 30+ languages.

Cons

• No chat-with-PDF, citation or study tools.
• Short summaries may not be enough for dense technical or academic papers.
• The listing was last updated in August 2025.

Availability: Chrome

Pricing: Free

Researchwize

ResearchWize now positions itself as an evidence-first workspace for coursework. The extension opens in a side panel, summarizes web pages, analyzes PDF, DOCX and TXT files, and reads scanned PDF pages with OCR. You save sources to a local Browser Library, organize them into projects, and then build “evidence plans” (outlines and gap reviews) in the web app. That’s useful for writing research papers from scanned or image-heavy sources that other summarizers can’t read.

Pros

• OCR for scanned PDFs.
• Keeps summaries tied to their sources, with a local Browser Library.
• Extensions for Chrome, Edge and Firefox, plus a web app.

Cons

• The free allowance is small (a handful of source analyses).
• The workflow is geared to assignments, which is overkill if you only want a quick summary.

Availability: Chrome, Edge, Firefox, web

Pricing (as of October 2026): Free account with limited analyses. Plus $8.99/month or $69.99/year.

Textero Ai

Textero AI is a writing assistant for students that includes a summarizer. The free extension summarizes long texts in Short and Bullet Point formats, and two more detailed modes are on the Textero website for premium users. The same extension also offers a grammar checker, paraphraser, essay grader, plagiarism checker and AI detector, and the site helps you pick credible citations.

Pros

• Summarize and then move straight into drafting and editing in one tool.
• Free summary formats in the extension.
• Available for Chrome and Edge.

Cons

• Summarizing is one feature among many, so it’s not a specialist PDF tool.
• Detailed summary modes are on the website and premium only.
• The Chrome listing was last updated in January 2025.

If you’re writing up research, you’ll also need to cite sources correctly. See our guide to APA, MLA and Chicago citation formats for video sources.

Availability: Chrome, Edge

Pricing (as of October 2026): Free core features. Premium $19.99/month, $44.99/quarter or $99/year.

Smallpdf

Smallpdf is a full PDF toolkit in an extension: compress, convert, edit, merge, split, organize and e-sign. It also has an AI assistant that can summarize, translate or chat with any PDF, including papers opened from Google Scholar. If you already use Smallpdf for document work, it’s the most convenient option.

Pros

• Summaries, translation and chat sit alongside dozens of PDF tools.
• Works on PDFs you open in the browser or upload.
• Widely used and actively maintained (last updated July 2026).

Cons

• The free plan limits downloads and usage. Unlimited use and OCR conversion need Pro.
• Summarizing is one tool among many, with fewer summary styles than dedicated AI summarizers.

Availability: Chrome

Pricing: Free with limits. Smallpdf Pro has a 7-day free trial.

Ask Your PDF

AskYourPDF is a chat-first tool. Instead of reading a generic summary of a 100-page report, you ask questions like “What were the three key findings in Section 4?” and get answers drawn from the document. It’s well suited to analysts, legal professionals and students pulling specific facts from dense files.

Pros

• Strong chat-with-PDF focus, with summaries available too.
• Paid plans handle very long files (up to 2,500 pages per document on Premium) and add OCR and multi-document chat.

Cons

• AskYourPDF’s pricing page lists Chrome extension access as a paid-plan benefit. The free web plan is limited to 100 pages per document and one document a day.
• Chatting is slower than a one-click bullet summary when you only need the gist.
• The extension listing was last updated in August 2024.

Availability: Chrome

Pricing (as of October 2026): Free web plan. Premium $11.99/month and Pro $14.99/month, both billed yearly.

Scholarcy

Scholarcy is a specialist for research articles. Open a paper in your browser and it builds a referenced summary with key points highlighted, generates interactive Summary Flashcards, suggests background reading, and links to open-access versions of each cited reference. It can also extract figures and tables. The flashcards are handy for students revising and for literature reviews.

Pros

• Built around the structure of academic papers.
• Summary Flashcards and reference links speed up literature screening.
• Comparative Analysis shows how a paper builds on earlier research.

Cons

• For PDF files, the article must be open access.
• Not designed for general web content or business documents.
• No chat-with-PDF.
• Unlimited use requires a Scholarcy Library subscription.

Availability: Chrome

Pricing: Limited free use. Unlimited use, plus saving and exporting flashcards, comes with a Scholarcy Library subscription (see scholarcy.com for current prices).

Pdf.ai

PDF.ai is a straightforward “chat with PDF” extension. Open an online PDF or a local file and ask questions, request a summary, or search for anything in it. It also integrates with Google Drive and Dropbox.

Pros

• Simple, chat-focused interface.
• Works with online, local, Google Drive and Dropbox PDFs.

Cons

• Limited to document chat. It won’t summarize videos or web pages.
• The listing was last updated in June 2024, so check it still works for you before relying on it.

Availability: Chrome

Pricing: Free to install, with in-app purchases.

How to Summarize a PDF with TubeOnAI

If you searched for the TubeOnAI PDF summarizer, here’s the short version:

1. Install the extension: add the TubeOnAI Chrome extension and sign in, or create a free account.
2. Open or upload the PDF: open the PDF in Chrome and run TubeOnAI on it, or upload the file in the web app.
3. Read and question the summary: use Ask Follow-Ups to ask about anything the summary skips.
4. Reuse it: translate it, listen to it, save it to a Collection, or repurpose it into notes or a post.

Prefer not to install anything? Try the free AI PDF summarizer or the PDF to notes converter in your browser. If you want study notes from a video rather than a document, there’s also a YouTube to PDF notes converter. And for video transcripts, see how to generate a transcript from a YouTube video.

How to Choose a PDF Summarizer Extension

• Scanned or image-based PDFs: you need OCR. ResearchWize includes it in the extension. AskYourPDF includes OCR on paid plans.
• Very long files: check page and size limits. Gist AI says it has no limits. AskYourPDF’s free plan caps you at 100 pages per document.
• Questions, not summaries: choose a chat-first tool (Smallpdf, AskYourPDF, PDF.ai or TubeOnAI’s Ask Follow-Ups). See our guide to chatting with any document.
• Academic papers: Scholarcy for open-access articles and references, ResearchWize for coursework and evidence planning.
• More than PDFs: if you also summarize videos, podcasts and articles, a general tool like TubeOnAI or Gist AI saves you running several extensions.
• Maintenance: prefer recently updated listings. Chrome has removed all Manifest V2 extensions from the Web Store, and listings untouched for years are more likely to break.
• Privacy: every tool here processes your document in the cloud. Read the privacy policy before uploading anything confidential.

FAQs

Is there a Chrome extension that summarizes a PDF automatically?

Yes. Gist AI summarizes the open PDF in one click, and TubeOnAI, Smallpdf and ResearchWize summarize a PDF you open in the browser or upload. Scholarcy does the same for open-access research papers.

Which is the best free PDF summarizer extension?

Gist AI is the most generous free option, describing its summaries as unlimited with no page limits. TubeOnAI’s free Starter plan (400 credits) and Smallpdf’s free tier work for occasional use. AskYourPDF’s free plan is web-only, since its pricing page lists extension access under paid plans.

Can these tools summarize academic research papers?

Yes. Scholarcy is built for research articles, with referenced summaries, flashcards and links to cited sources, though PDFs must be open access. ResearchWize is designed for coursework and can read scanned PDFs with OCR.

Can I summarize a long PDF into bullet-point notes?

Yes. Gist AI and Textero produce bullet-point summaries. With TubeOnAI, Smallpdf or AskYourPDF you can also ask for “the key points as bullets” in chat. For a dedicated tool, try our PDF to notes converter.

Do these summarizer tools work offline?

No. They all send the document to cloud-hosted AI models, so you need an internet connection.

Is my document safe when using these tools?

It depends on each provider’s policy. Check the privacy section of the Chrome Web Store listing and the provider’s privacy policy, and avoid uploading confidential or sensitive documents to any cloud AI tool.

Can I use these tools on mobile devices?

Chrome extensions don’t run in mobile Chrome. TubeOnAI has iOS and Android apps, and Smallpdf offers a mobile app. For the others, use their websites on mobile.

Do these tools summarize PDFs in other languages?

Several can translate summaries. TubeOnAI translates into 30+ languages, Gist AI into 30+ languages, and Smallpdf’s AI assistant can translate PDFs.