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BLUF

Browser extension that summarizes and explains web pages, PDFs, videos.

Last updated: Jul 29, 2026

Pricing

Updated: Sep 8, 2025
Starting Price
Free
Pricing Model
subscription
Free Plan
Yes
Free Trial
No

About BLUF

BLUF (Bottom Line Up Front) is a browser extension that summarizes, explains, and answers questions about content a person is already viewing, a website, a PDF, or a YouTube video, without needing to copy text into a separate chat window. Three modes cover most reading tasks: Summarize condenses a page's key points, Explain breaks down complex or technical terms into simpler language, and Ask lets a user search for a specific answer within the content rather than skimming manually. A keyboard shortcut (Shift + Alt + B) triggers the extension without leaving the page. The tool is aimed at people who read a lot of dense material and want the core takeaway quickly, researchers, students, journalists, forum moderators, social media managers, and professionals juggling many sources in a day. It runs as a browser extension rather than a standalone app or API. BLUF uses a tiered subscription: a free plan with 25 prompts a month and a 20,000-word page limit, a Standard plan at $4/month with 200 prompts and a 50,000-word limit, and a Professional plan at $10/month with unlimited prompts and a 200,000-word limit. No company name beyond the product itself, founding year, or third-party integrations are stated on the site.

At a glance

Platforms
Chrome Extension
Last verified
July 2026
Last updated: July 29, 2026

Who It's For

  • •Researchers
  • •Students
  • •Journalists
  • •Social media managers
  • •Busy professionals

How It Works

  1. 1Navigate to the desired website, PDF document, or YouTube video.
  2. 2Activate BLUF using a keyboard shortcut or right-click menu.
  3. 3Choose to summarize or explain the content.
  4. 4Receive a concise summary or explanation of the content.

How to Use BLUF

  1. 1Install the BLUF browser extension for Chrome or Firefox.
  2. 2Open the content you want to analyze.
  3. 3Use the shortcut Shift + Alt + B or right-click and select BLUF icon.
  4. 4Select 'Summarize' or 'Explain' to get insights.
  5. 5Ask follow-up questions if needed for deeper understanding.

Key Features

  • •Page/PDF/YouTube summarization
  • •Concept explanation (Explain mode)
  • •In-content Q&A (Ask mode)
  • •Keyboard shortcut activation
  • •Tiered word-limit subscriptions

Use Cases

  • •Quickly digesting long articles or PDFs
  • •Summarizing YouTube videos
  • •Research and literature review
  • •Simplifying technical or legal jargon

Pros & Cons

Advantages

  • •Offers quick and accurate summaries of diverse content types.
  • •Seamless browser integration for easy access.
  • •Helps save time and improve understanding.

Disadvantages

  • •Limited to Chrome and Firefox browsers currently.
  • •Free tier has prompts and word limits for casual users.
  • •Dependence on AI may lead to occasional inaccuracies.

Alternatives

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Frequently Asked Questions

What is BLUF?

BLUF (Bottom Line Up Front) is a browser extension that summarizes, explains, and answers questions about content a person is already viewing, a website, a PDF, or a YouTube video, without needing to copy text into a separate chat window. Three modes cover most reading tasks: Summarize condenses a page's key points, Explain breaks down complex or technical terms into simpler language, and Ask lets a user search for a specific answer within the content rather than skimming manually.

How much does BLUF cost?

BLUF has a free plan; paid plans start at $4.

Is BLUF free?

Yes, BLUF offers a free plan you can start with.

What are the best BLUF alternatives?

Popular BLUF alternatives include Merlin, Sider.

What is BLUF used for?

BLUF is commonly used for Quickly digesting long articles or PDFs, Summarizing YouTube videos, Research and literature review.

What platforms does BLUF support?

BLUF is available on Chrome Extension.

Information Accuracy

Please note: While we regularly update all tool information including descriptions, features, pricing, and other details, this information may change over time as tools evolve and update their offerings. For the most current and accurate information, we recommend visiting the official website directly. Our goal is to provide you with comprehensive and up-to-date information to help you make informed decisions.