Glarity Summary

Glarity Summary

Felo Inc. · Writing

Glarity is a browser extension from Felo Inc. that reads pages, videos, and documents for you and returns a short digest. Point it at a YouTube lecture, a Google result page, a PDF report, or any article, and it produces a summary, key moments, or a Q&A box in the sidebar. It also translates as you browse, using either machine engines or a large language model. More than 100,000 people use it. The core extension is free, and paid tiers start at $7.49 a month.

Interface preview of Glarity Summary

About Glarity Summary

What Is Glarity

Glarity is an AI summarizer extension that lives inside your browser. Instead of copying text into a chatbot tab, you keep reading in place and let the extension work on the page you already have open. Ask for a summary of a two-hour video, a bullet list of a long article, or a plain-language take on a search query. Glarity answers in the sidebar.

Felo Inc. publishes the extension, and the source code sits in the open on GitHub under the sparticleinc project. The build ships through the Chrome Web Store, Microsoft Edge Add-ons, and Firefox add-ons, so you can install it on Chrome, Edge, or Firefox and log in with a Google account to sync usage. Safari versions exist for iOS and macOS as well. The extension runs on the current 4.46.7 release, updated July 12, 2026, and speaks 51 languages.

Context is what sets Glarity apart from a plain chatbot. It reads the page's structure, not just the visible text. On YouTube it can mark timestamps and build an FAQ from the video itself. On search pages it weighs whether each result actually answers your question. On PDFs it keeps the document open while you chat with it. That page-aware behavior is why people leave it pinned to the toolbar.

Getting Started

Install the extension from your browser's add-on store, then sign in with a Google account when Glarity asks. The free tier starts right away. No payment method is needed. Pin the icon to the toolbar so the sidebar opens on any page with one click.

Open a video, search page, or article and click the Glarity icon. There is a floating button on the right edge too. Use it when you would rather not open the toolbar menu. Choose a task from the panel, such as Summarize or Translate, and give it a moment to read the page. You can also select text first and run the summary or translation on just that selection.

For heavier use, connect your own model key. Glarity accepts OpenAI, Azure, and Google Gemini credentials, which lets you route requests through a provider you already pay for instead of buying a subscription. The Settings menu holds language, summary style, and a site allow/block list, so you can switch Glarity off on pages where it isn't useful.

Product Information

A quick look at Glarity Summary's pricing, supported platforms, and performance.

Free PlanYes
Paid Plans$7.49 - $49.99/mo
PlatformChrome, Edge, Firefox, Safari (iOS and macOS)
DeveloperFelo Inc.
CategoryWriting
Release DateN/A
Latest UpdatedSep 2026
Website Visits456.9K
Website Global Rank137.6K
API AvailabilityYes

Key features

Video and YouTube Summaries

Glarity reads the transcript of a YouTube or Bilibili video and turns it into a short summary, a list of key moments with timestamps you can click, and an FAQ covering the main points. You can also ask the video direct questions, such as what a speaker said about a specific topic, and get an answer tied to the relevant part of the transcript. This saves the most time on long talks and lectures. You get the substance without the watch.

Webpage and Search Summaries

A webpage summarizer is only as useful as its accuracy, so Glarity ties every claim to the page it read. On any article it generates a summary in your chosen language and lets you follow up with questions about the content. On Google and Bing it adds an overview of the results and helps judge which pages are worth opening, with links to the sources so you can verify the claims yourself. A custom prompt option steers what the summary focuses on. That helps when you have a specific question rather than a general interest.

PDF Summaries and Document Chat

Glarity handles local PDF files, not just web pages. The PDF summarizer returns a multi-language digest plus a chat box that answers questions about the document. Think of it as a searchable index of a long report. You can also select a passage and have it translated or explained without leaving the file. For dense material such as contracts, manuals, or academic papers, this turns a slow read into a set of targeted questions.

Translation With Four Engines

The translation tool supports a mirror or side-by-side view that keeps the original next to the translated text. That matters when you want to check meaning rather than just skim. You pick the engine per task: LLM-enhanced mode, DeepL, Google, or Microsoft. Translate a whole page or only selected text. Custom prompts shape tone and terminology, so a translation can read naturally instead of literally.

Screenshot and Image Translation

When text is trapped inside an image, a screenshot, or a graphic, Glarity lets you capture or right-click the image and translate the text inside it. It also answers questions about what is in the image, such as explaining a formula or describing a chart. This covers the cases where standard page translation fails, like product photos, scanned pages, and image-heavy posts.

Writing Assistant

Glarity can draft replies inside Gmail, rephrase or rewrite passages on a web page, and help compose posts for social platforms. You highlight what you wrote or what you received, pick a rewrite style, and the extension returns a cleaner version. It's a light writing coach rather than a full editor, but it removes the friction of switching to a separate tool for quick fixes.

Pros and cons

Pros

  • Free tier is genuinely usable, and the core extension costs nothing to install.
  • Page-aware summaries beat copy-pasting text into a general chatbot.
  • Bring-your-own API key avoids a subscription if you already pay for a model.
  • Search, video, PDF, and translation live in one extension instead of four.
  • Open-source codebase lets you check what the extension actually does.

Cons

  • The free plan limits how many AI queries you get before you hit the paid tiers.
  • Quality depends on the underlying model, so results vary between providers and pages.
  • Summaries can miss nuance on dense or technical material, so verify critical details.
  • You need a Google account to sign in, which puts a login between you and first use.
  • Heavier features are tied to the paid plans at $7.49, $14.99, or $49.99 a month.

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