Glarity brings cross-language summaries, translation and contextual AI chat to YouTube, webpages, PDFs and Gmail. Its free extension can use different account modes, with paid plans and provider usage charges depending on the mode.
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Glarity is an open-source browser extension for cross-language summaries of videos, searches, PDFs, emails and webpages. It combines reading assistance with translation and contextual questions, so the material being viewed can become the subject of an AI conversation.
Felo Incorporated is identified as the seller in the commercial disclosure. Glarity's scope extends beyond a YouTube summarizer: side-by-side translation, selected-text translation, email drafts and web-content questions are central parts of its positioning.
The free extension, selected AI account mode and paid subscription have separate access and billing conditions.
Glarity provides YouTube transcripts, one-click subtitle copying, navigation to key moments, interactive video questions and customizable summaries. These outputs serve different reading tasks: a summary condenses the subject, a transcript preserves a text version, and key moments connect the reader to relevant parts of the video.
Glarity displays original and translated text side by side, with selected-text translation for webpages and PDFs and tailored handling for sites including Google, Twitter, Reddit, Yahoo and Wikipedia. The parallel view keeps the translation beside the wording it interprets.
The extension listing names four translation engines: LLM Enhanced, Google, DeepL and Microsoft. It also describes configurable translation prompts and areas.
The extension can capture the current tab for local saving and use screenshots for image translation, mathematical-formula interpretation and image questions. Local saving of a screenshot does not make its subsequent AI processing local.
Glarity offers generation and improvement of articles, emails and social media responses. Its reading tools can therefore lead into a draft or rewritten response.
Gmail assistance includes smart replies, multilingual communication, message summarization and sender-intent analysis. The summary condenses a received message; the reply tool proposes a response. Intent analysis remains an AI interpretation.
The listed YouTube workflow is to install and pin Glarity, open a video and click Generate Summary, with highlights, key moments, FAQs and questions available.
The webpage workflow uses the Glarity icon on the right side of the browser and the Summarize Page option. The documented sequence starts with installation from the browser's extension store and an open webpage.
For PDF chat, the documented sequence is to install Glarity, open a PDF in the browser, click the extension icon and generate a summary or ask questions.
For side-by-side webpage translation, the Chrome workflow uses the right-click command toggle translate page. The original and translated text appear in parallel. Selected-text translation handles a narrower passage on a webpage or in a PDF.
The Gmail workflow opens an email, uses quick reply, shows a suggestion and lets the user accept it and copy or insert it into the reply box.
This documented workflow ends with copying or inserting draft text. The broader marketing phrase “automated replies” does not by itself establish unattended email sending, inbox rules or an autonomous outreach system.
Glarity's Twitter support summarizes main posts across languages and analyzes comments, feedback and opinions. This covers both the original post and reactions to it.
The documented thread workflow opens a Twitter thread and automatically displays a summary. A comment interpretation is not a verified measure of the whole audience's views.
The webpage-summary guide lists news, shopping, entertainment and review sites among its supported reading contexts. These are reading contexts, without independent verification of the underlying authors' claims.
The guide also lists PubMed, PMC and Google Patents under academic websites, and GitHub under developer sites. Those examples support research and technical reading, without establishing academic validation, patent analysis or code auditing.
The fit is strongest when document discussion, translation, video navigation and email drafting are useful together. Transcript export or a narrowly focused video digest gives the alternatives a different appeal.
Glarity's homepage offers installation links for Chrome, Edge, Safari, Firefox and Opera. These are advertised distribution paths, rather than a guarantee for every browser version and device configuration.
The video product also advertises online video summarization without installation. This complements the browser-extension route.
Glarity's public source repository specifies GPL-3.0 licensing. The code license is separate from hosted-service terms and generated-content rights.
Account setup also depends on the selected model route. The listing describes Claude WebApp use as requiring a Claude account and permission to access Claude.ai cookies. Glarity mode is described as allowing Google and YouTube summaries without a ChatGPT/OpenAI account, while ChatGPT and OpenAI key modes remain selectable for people using those accounts.
The extension listing distinguishes a free installation from token-based service charges in Glarity or OpenAI key mode, while describing ChatGPT mode as free at present. Another account FAQ calls the selectable modes free by default. Neither wording establishes cost-free usage in every mode.
The default USD view captured on November 2, 2026 displayed annual billing and a Save 70% on annual plan banner. The monthly figures below are the displayed monthly equivalents of that annual purchase, alongside the separately stated charge every 12 months.
| Plan | Displayed monthly equivalent | Charge every 12 months | Reading allowance | Advanced queries |
|---|---|---|---|---|
| Standard | $7.49 | $89 | 2000K tokens per month | 150 per month |
| Pro | $12.49 | $149 | 5000K tokens per month | 600 per month |
| Plus | $15 | $179 | Advertised as unlimited tokens | Advertised as unlimited |
Plus carried a limited-time 70% offer in that captured view. Its “unlimited” wording has an important qualification: Plus guarantees at least 600 GPT-4 queries per month, with possible reductions in response speed and quality after the limit. The unlimited headline therefore does not guarantee uninterrupted premium performance at any volume.
Token consumption includes queries, returned content and instructional content, rather than just the words in the source text. A reading allowance therefore is not a matching allowance of document words. The July 2024 plan FAQ describes Standard, Pro and Plus as differing in token quantities and advanced-model usage limits, without functional differences.
Subscriptions can be canceled at any time through personal account settings, according to the plan FAQ. Its July 2024 payment list includes Google Pay, Apple Pay, Link, Alipay, WeChat Pay and credit cards. The commercial disclosure separately lists credit-card payment; the older FAQ is not a verified view of every currently available checkout option.
The commercial disclosure states a no-questions-asked refund within seven days of service inception. The terms separately say payments are nonrefundable except as provided in the agreement. The specific window is not an unrestricted later refund right.
The commercial disclosure also lists a purchase price varying from JPY2,198 depending on the plan, without a billing period in that row. That figure is not a verified yen-denominated monthly equivalent of the USD annual cards.
Glasp is a relevant alternative when transcript handling and exported reading notes carry more weight. Its YouTube, article and PDF summaries include chat, clickable timestamps, transcript highlighting and exports to Notion, Obsidian and Markdown. This favors preserving selected material in a notes workflow.
Eightify emphasizes timestamped summary navigation, a top-comment overview, transcriptions, multilingual summaries and one-click sharing as articles. Its focus suits reviewing YouTube material and sharing a digest, without establishing a comparative accuracy or speed advantage.
Glarity's combination of browser translation, contextual reading and Gmail assistance is the broader choice represented here. Glasp's export-and-highlighting organization and Eightify's video-oriented summary presentation are different priorities.
Glarity's terms say generated output may be incorrect and may not accurately reflect real people, places or facts. This applies to summaries and message interpretations, including answers about papers, contracts and emails.
Glarity/Felo.AI accounts are intended for individual use; robot activity or multi-user access could lead to suspension. The Plus plan is also described as in testing and subject to changes influenced by provider guidelines, with notices delivered in-app and through the website. The allowance does not establish shared-team or automated bulk-processing rights.
The terms require the necessary rights to input video content and disclaim non-infringement warranties. Summarizing a video does not itself resolve rights in the input material. The content clause says that, as between the parties and to the extent permitted by law, the user owns all Input; it permits Glarity to use Content, encompassing inputs and outputs, to provide and maintain services, comply with law and enforce policies.
That clause leaves responsibility for Content with the user. Its explicit ownership statement concerns Input, rather than an express assignment of all Output in the same clause. The terms also prohibit using output to develop competing models, falsely presenting generated output as human-written, and automated extraction except as permitted through an API. These are service-use restrictions, separate from the source repository's code license.
The privacy policy lists account, contact, credential, payment and transaction information, as well as personal information included in inputs, uploads and feedback. Automatically received information includes IP addresses, browser settings, interaction logs, feature usage and device information.
The extension listing contains a material tension: it first says data stays in the browser and is not shared, then describes sending account credentials to its server, exchanging prompts and webpage content with the model, and collecting anonymous usage statistics. These statements do not support a blanket claim that all Glarity processing remains on-device or that no content leaves the browser.
The policy permits hosting, cloud, IT, email and analytics providers to process or store personal information when performing duties under Glarity's instructions. It also allows aggregated or de-identified information to support service analysis, feature improvements and research. The reviewed terms/privacy text does not supply an explicit model-training or no-training commitment; general improvement and research language does not resolve that question on its own.
Retention is tied to service needs and legitimate business purposes, including disputes, safety and legal obligations. Duration depends on factors such as information sensitivity, potential harm, processing purpose and legal requirements, rather than a fixed number of days in the retention clause.
No. Its reading and writing scope also includes webpages, PDFs, search material, translation and Gmail assistance. The video tools are one entry point into that wider browser-oriented product.
The listing describes Glarity mode as usable without a ChatGPT/OpenAI account. Other routes have their own requirements: ChatGPT and OpenAI key modes use the corresponding account route, and the Claude WebApp option requires a Claude account and cookie authorization.
The Plus card advertises unlimited usage, while its qualification guarantees at least 600 GPT-4 queries per month and allows reduced response speed and quality after the limit. It is not an unqualified guarantee of the same premium-model performance at every usage level.
