A private AI summarizer in your browser for articles, videos, PDFs, DOCX files, and pasted text. It runs on WebGPU, WebAssembly, or your own local Ollama or llama.cpp server.
Website | Architecture | Models | Browsers | Privacy | Roadmap | Store listing | License
An offline-first browser extension that respects privacy, built with care by darshi1337 and contributors
For AI Assistants and LLMs: Read llms.txt for codebase structure, build scripts, test commands, and developer instructions.
Apogee is an AI browser assistant for articles, videos, emails, and more. It runs fully in your browser: on your GPU with WebGPU (Chrome, Edge, and other Chromium browsers) or on your CPU with WebAssembly, which now works everywhere. WebAssembly is the default on Firefox and an opt-in fallback on Chromium browsers. It helps on machines without WebGPU. No backend, no API keys, no cloud. Install the extension and start.
For power users, Apogee also talks straight to a local Ollama instance over 127.0.0.1 or to a llama-server you run yourself.
In short: Apogee summarizes pages, videos, PDFs, DOCX files, and pasted text locally. No account, API key, backend, or cloud upload is needed.
⭐ If Apogee helps you, star the repository. It helps the project reach more contributors.
- Install Apogee from the Chrome Web Store or Firefox Add-ons.
- Open a page, video, PDF, or DOCX file, or paste text into the Apogee popup.
- Pick a summary format and select Summarize.
The first in-browser run downloads the picked model. After the model is cached, summaries run offline. For larger models, set up Ollama or llama.cpp in Settings.
Apogee was inspired by Mozilla's discontinued Orbit project. Orbit tried browser-based page summarization, but it used central API servers and stored summaries on servers.
Apogee fixes Orbit's design and privacy problems by staying local-first:
- Local by default: Tokenization, inference, retrieval, and caching happen on your device.
- Private by design: Page content, transcripts, files, and summaries never go to cloud APIs.
- No account needed: No subscription, API key, telemetry service, or Apogee backend exists.
The table below compares Apogee with common cloud-based AI extensions and Mozilla's discontinued Orbit project.
| Feature or Architecture | Apogee | Cloud AI Extensions | Mozilla Orbit Project |
|---|---|---|---|
| Local On-Device Inference | Yes (WebGPU, WASM, Ollama, and llama.cpp) | No (Requires cloud API endpoints) | No (Relied on remote Mistral 7B servers) |
| Zero API Key Requirement | Yes (No keys, subscriptions, or accounts) | No (Requires API keys or paid tiers) | Yes |
| Offline Functionality | Yes (Works offline after initial weight cache) | No (Requires active internet connection) | No (Failed without server connection) |
| Zero Data Transmission | Yes (Page contents never leave your device) | No (Full webpage text uploaded to servers) | No (Page summaries cached on remote server) |
| Open Source License | Yes (MIT License) | Varies | Yes |
| Local Ollama Integration | Yes (Direct loopback HTTP connection) | Rare | No |
| Local llama.cpp Integration | Yes (Direct loopback HTTP connection to llama-server) |
Rare | No |
| Grounded Passage Highlighting | Yes (Interactive source sentence scroll) | Rare | No |
- Articles and Web Pages: Clean text extraction with Readability and site-specific extractors for Wikipedia, GitHub, Reddit, Hacker News, Bluesky, Mastodon, Lemmy, Discourse, Stack Overflow, Lobsters, and arXiv.
- Selected Text: Select at least 20 characters on a supported page and use Selection in the popup or the browser context menu to summarize only that text. Follow-up Ask questions keep the picked text as their source.
- YouTube and Bilibili Videos: Interactive timestamped timelines. Click key moments to jump straight to them in the video.
- Social Threads: Bluesky, Reddit, Hacker News, Mastodon, Lemmy, Discourse, and other discussion sites are parsed into structured Markdown. Author, score, and reply order are kept.
- Local documents and text: Pick or drag PDF, DOCX, TXT, Markdown, JSON, or HTML files into the popup, or paste text directly.
- Ask Q&A with Smart Retrieval: Passages are matched locally. You can ask about long documents without losing context.
- Grounding and Sentence Highlighting: Click any summary bullet to scroll the page straight to the source passage on Chromium browsers.
- Persistent Chrome Side Panel: Keep the summary or Ask view open next to the page while you browse.
- Light and dark themes: Change themes from the home and summary headers.
- Custom Standing Instructions: Set your own prompt guidance such as simple explanations or technical summaries.
- Multi-Language Translation: Summarize pages into 32 target languages with the default Helsinki-NLP Opus-MT engine or direct LLM translation.
| Extension Popup | Persistent Side Panel |
|---|---|
|
|
- Zero Data Leaks: Page contents, transcripts, PDFs, and summaries are handled locally. They are never uploaded to cloud APIs.
- Local Loopback: Ollama and llama.cpp connections run strictly over local loopback (
http://127.0.0.1). Any other host is refused. - Anonymized SponsorBlock: YouTube sponsor lookups send only a k-anonymity hash prefix. You can turn them off under Settings > Privacy to stay fully local (then no lookup request is made at all).
- Sensitive Site Exclusions: Gmail, Outlook, Proton Mail, Yahoo Mail, Google Messages, WhatsApp Web, Telegram Web, Slack, Discord, Microsoft Teams, and custom domain lists are left out of disk caching.
Read the full security model in Privacy and Security Architecture.
- Browser Support: Browser compatibility table, WebGPU versus WebAssembly execution, and Ollama support.
- Model Reference: Full model table, download sizes, context windows, and benchmarks.
- Local llama.cpp Guide: Setup steps for linking Apogee to your own
llama-serverinstance. - Local Ollama Guide: Setup steps for local models on macOS, Windows, and Linux.
- Translation Reference: Overview of 29 supported target languages and Opus-MT model tiers.
- Privacy Architecture: Full details on network limits, storage, and permissions.
- Error Messages Guide: Full list of user-facing messages, causes, fixes, and diagnostics.
- Troubleshooting: Fix the common failures by symptom: no WebGPU, stalled model download, Ollama unreachable, slow Firefox, unreadable page.
Extractor contributions need no browser, GPU, or model download. The fixture harness runs site extractors against saved HTML in Node.js 22 or newer:
cd apogee-extension
npm install
npm testSee the extractor test harness and worked examples to add a fixture or test a site-specific extractor. The contributing guide lists available issues and the checks to run before a PR.
- Architecture Reference: Details on the 4 contexts, how it works, execution flows, and trust limits.
- Developer Setup: Steps to build, run watch mode, run test suites, and format code.
- Contributing Guide: Rules for opening pull requests, sending code changes, and claiming issues.
- Project Roadmap: Feature roadmap, planned milestones, and completed releases.
- Changelog: Full release history and version changes.
- Security Policy: Security policy, how to disclose flaws, and reporting steps.
- Code of Conduct: Community standards and guidelines.