Glarity
Glarity is a free and open-source browser extension designed to improve the efficiency of searches on popular websites such as Google, YouT...
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What is Glarity?
Glarity is a browser extension and web tool that provides AI-powered summaries, translations, and reading/writing assistance directly alongside web content. It generates concise summaries and transcripts for YouTube videos, articles, PDFs and search results, and offers side-by-side (mirror) translations to read content in another language while preserving the original. The product also includes an AI Reader for deeper document analysis, an AI Writer for drafting short emails or replies, and an in-page Q&A/chat feature that lets users ask questions about the current page. Glarity targets researchers, students, multilingual readers, knowledge workers, and anyone who wants to quickly extract the gist of long videos, articles, or documents without leaving the page. The extension emphasizes being free, open-source, ad-free, and compatible with multiple large models (ChatGPT/GPT-4o and others), making it suitable for privacy-conscious users and those who want flexible model choices.
Glarity pricing
Pricing model: Freemium
Glarity offers a free, ad-free tier as its primary offering; core features like YouTube summaries, page summaries, side-by-side translations, AI Reader and basic AI Writer functions are available at no cost. The site notes compatibility with multiple models (user-provided API keys) so paid usage may occur if a user supplies a paid OpenAI/other model key for higher-capacity models; there is no mandatory subscription listed on the site itself and a free plan is prominently provided.
Glarity pros
- Instant AI summaries for YouTube videos
- Generates video transcripts automatically
- Summarizes web pages and PDF documents in-page
- Side-by-side (mirror) translation for bilingual reading
- In-page Q&A/chat that references the current page
- AI Writer that drafts quick email replies in Gmail
- Supports multiple LLM providers including GPT-4o
- Open-source codebase for transparency
- Ad-free user experience
- Browser extension support across major browsers
- Extracts targeted content using custom prompts
- Creates FAQs and key-points for videos
- Works on search results (Google) with recap panels
- Supports summarizing social posts (Twitter, Reddit)
- Free tier available without mandatory payment
Glarity cons
- Requires a ChatGPT/OpenAI account or API key for some features
- Quality depends on the chosen LLM and its limits
- Long or highly technical videos may produce less-detailed summaries
- May need manual API key setup for stable use
- Browser-extension scope means mobile app functionality is limited
- Occasional parsing issues on complex page layouts
- Language support varies by model and may be uneven
- Features that rely on external LLMs may incur third-party usage limits
Frequently asked questions about Glarity
Do I have to pay to use Glarity?
No — Glarity provides a free, ad-free extension with core features available at no cost; however, users who want to route requests through paid LLM APIs (for higher-capacity models) may incur charges from those third-party API providers if they supply their own API key.
Which browsers does Glarity support?
Glarity is available as a browser extension for major browsers including Chrome, Edge, Safari (Mac/iOS), Firefox and Opera, allowing in-page summaries and translations across those platforms.
Can Glarity summarize YouTube videos and provide transcripts?
Yes — Glarity generates transcripts and concise summaries for YouTube videos, and can extract key points and create FAQs or highlights from video content directly beside the video player.
How does the side-by-side translation work?
Glarity’s Mirror Translation displays the original text alongside a translated version so you can compare them; translations are produced by the configured LLM and support cross-language reading without replacing the original content.
Do I need a ChatGPT/OpenAI account to use Glarity?
Some features work with Glarity’s built-in options, but for stable access to certain LLMs or to use a specific model (like GPT-4o) users may connect their ChatGPT/OpenAI account or paste their API key into Glarity’s settings.
Can Glarity summarize PDFs and scholarly pages like PubMed?
Yes — the AI Reader can parse and summarize PDFs and pages from sites such as PubMed, PMC and other supported sources, extracting key findings and simplifying technical content for quicker review.
Is Glarity open-source and is the code auditable?
Yes — Glarity is presented as an open-source project, allowing transparency into how the extension operates and enabling community inspection or contribution to the codebase.
How accurate are the summaries and translations?
Accuracy depends on the underlying language model selected or provided by the user; Glarity surfaces concise, model-generated summaries and translations that are generally useful for skimming but can miss nuance on highly technical or context-heavy material.
Can I use Glarity for email drafting and replies?
Yes — Glarity includes an AI Writer feature that can generate short email replies or help draft messages (for example, within Gmail) to speed up routine communications.
Does Glarity show summaries alongside search results?
Yes — Glarity injects recap panels alongside Google search results (and other supported sites) so you can see condensed summaries without opening every link.