Glarity
: How to use it, features, and the business problems it solves
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What is Glarity?
A multifunction browser extension from Felo Inc. that summarizes and translates YouTube, Google search, articles, PDFs and emails with AI, plus full-page translation, bilingual subtitles and AI chat. You can choose GPT-4o, Claude 3.5 Sonnet or Gemini 1.5 Pro (or your own API key), and it is integrated with the company Felo's "Felo AI Chat." 51 languages incl. Japanese; 1M+ users.
Business problems it solves
About "Glarity"
What is Glarity
Glarity is a multifunction browser extension from Felo Inc. that summarizes and translates web pages and videos with AI. It can summarize YouTube videos, Google search, articles, PDFs and emails on the spot, and also handles full-page translation, bilingual subtitles and AI chat. It is integrated with the company's AI search "Felo AI Chat," and is used by over 1 million people.
The models have been updated. The older description of "using ChatGPT" no longer matches — it is now a multi-model setup where you can choose GPT-4o, Claude 3.5 Sonnet or Gemini 1.5 Pro, and you can use your own API key (as of August 2026).
Summarize and translate pages and videos on the spot
Glarity centers on summarizing and translating the page or video you're viewing, without leaving it. Long YouTube videos are summarized with highlights and FAQs, AI answers appear next to search results, and articles and PDFs give you the gist in one click. Translation lets you choose the engine and supports bilingual subtitles showing source and translation side by side.
Features
01Summarize
- Summary — YouTube, Google search, articles, PDFs, emails
- Smart Search — show AI answers next to search results
- YouTube summaries — highlights, FAQ and subtitle generation
02Translate
- Page & selected-text translation — whole pages or selected passages
- Bilingual subtitles — source and translation side by side
- Engine choice — LLM / Google / DeepL / Microsoft
03Read, write, chat
- AI Reader — analyze/chat over PDFs up to ~300 pages
- AI Writer — write articles, quick replies for email and X (Twitter)
- AI Chat — converse with multiple models
How to use
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Install the extension
Add the extension to Chrome or another browser.
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Summarize/translate on a page or video
Run a summary or translation on the page or YouTube video you're viewing.
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Pick a model
Choose from GPT-4o, Claude 3.5 Sonnet or Gemini 1.5 Pro.
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Dig deeper with AI Chat
Ask follow-up questions about the summary or article via AI Chat.
Pricing
In addition to a free plan, there are paid plans (JPY; annual is cheaper; figures as of August 2026).
| Plan | Price | Advanced queries | Highlights |
|---|---|---|---|
| Free | ¥0 | — | Basic extension features |
| Standard | ¥14,000/yr | 150/mo | Allowance for top models |
| Pro (popular) | ¥1,998/mo, ¥19,898/yr | 600/mo | Expanded allowance |
| Plus | ¥28,000/yr | Unlimited | Unlimited advanced queries (in testing) |
Paid plans include full access to Felo Inc.'s AI search "Felo AI Chat." Advanced queries are the number of uses of top models (GPT-4o / Claude 3.5 / Gemini) and are token-based. Prices and limits can change, so check the official site for the latest.
How Glarity differs from other AI browser extensions/summarizers
Glarity stands out for bundling summarization, translation and AI chat into one extension, with a choice of models and translation engines, plus integration with Felo AI Chat.
| Aspect | Glarity | Video/article summary (LilysAI) | Understanding your docs (NotebookLM) |
|---|---|---|---|
| Form | Browser extension | Web service | Web service |
| Strength | Summarize/translate pages & videos | Summarize/note videos & articles | Summarize/cite your own docs |
| Models | Choose GPT-4o/Claude/Gemini | Depends on service | Google models |
For summarizing/noting videos and articles, LilysAI; for summarizing/citing your own documents, NotebookLM; for listening to text as audio, Audioread. For people who want to summarize and translate on the spot while browsing, Glarity is a strong choice.
This page is based on information published on the official site as of August 2026. Please check the official site for the latest specs and pricing.
