Sider
ExtensionFreeAI sidebar with ChatGPT and Claude for browsing assistance.
Capabilities8 decomposed
page-context-aware summarization
Medium confidenceExtracts and summarizes the full content of the current webpage by parsing DOM elements and sending the rendered text to Claude or ChatGPT APIs, maintaining conversation history across multiple summaries of different pages. Uses browser content script injection to access page DOM without cross-origin restrictions, then streams summarization results back to the sidebar UI with token-aware truncation for large documents.
Operates as a persistent sidebar with multi-turn conversation history across different pages, allowing users to ask follow-up questions about summaries without re-summarizing; uses browser content scripts for direct DOM access rather than requiring page-specific integrations
Maintains conversation context across page changes unlike one-off summarization tools, and avoids the latency of sending full page HTML to external APIs by pre-processing in the content script
selected-text explanation and elaboration
Medium confidenceCaptures user-selected text via content script event listeners, sends it to Claude or ChatGPT with a user-specified prompt (explain, simplify, expand, translate), and returns the response in the sidebar with full conversation history. Implements text selection detection through mouseup/touchend events and clipboard API integration for reliable text capture across different page structures.
Integrates text selection detection directly into the browser extension's content script, allowing instant context menu or sidebar activation without manual copy-paste; supports multiple prompt templates (explain, simplify, expand) without requiring separate API calls
Faster than ChatGPT's native web interface because it eliminates the need to switch tabs or copy-paste; more flexible than browser search because it provides AI-powered understanding rather than just definitions
writing assistance with tone and style adjustment
Medium confidenceProvides real-time writing suggestions for text entered in web forms, emails, or text areas by detecting input fields and offering grammar correction, tone adjustment (formal/casual/professional), and style improvements. Uses content script mutation observers to detect new text input elements and integrates with Claude or ChatGPT APIs to generate alternative phrasings without replacing user text automatically.
Operates as a non-intrusive sidebar assistant that detects web form inputs and offers suggestions without modifying user text directly; supports multiple tone presets (formal, casual, professional) without requiring separate prompts for each style
Integrates with existing web forms without requiring copy-paste to external tools like Grammarly; maintains conversation history allowing users to iterate on suggestions within the same session
image analysis and visual understanding
Medium confidenceCaptures images from webpages or allows users to upload images directly to the sidebar, sends them to Claude's vision API (or ChatGPT's vision capabilities), and returns detailed analysis including object detection, text extraction, scene understanding, and answering user questions about image content. Implements image encoding to base64 format for API transmission and maintains image context in conversation history for multi-turn analysis.
Integrates vision capabilities directly into the browser sidebar, allowing users to analyze images without switching to ChatGPT or Claude web interfaces; supports both webpage images and direct uploads, with conversation history maintaining image context across multiple questions
More convenient than opening ChatGPT separately for image analysis; maintains full conversation context unlike one-off image analysis tools, allowing follow-up questions and comparisons
pdf reading with conversational q&a
Medium confidenceDetects PDF files open in the browser or allows direct PDF upload to the sidebar, extracts text content using PDF parsing libraries, chunks the content for API token limits, and enables multi-turn conversation about PDF content. Implements context management by maintaining relevant PDF sections in conversation history and using semantic chunking to preserve meaning across page boundaries.
Implements PDF parsing and chunking within the browser extension to avoid uploading entire PDFs to external APIs; maintains conversation history with PDF context, allowing users to ask follow-up questions and reference specific sections without re-uploading
More privacy-preserving than uploading PDFs to ChatGPT directly because text extraction happens locally; faster than manually copying PDF text into chat because parsing is automatic
multi-turn conversation history with context persistence
Medium confidenceMaintains a persistent conversation thread in the sidebar that tracks all user queries and AI responses across different pages, images, and PDFs within a single session. Implements context management by selectively including relevant previous messages in API requests to maintain coherence without exceeding token limits, and stores conversation history locally in browser storage for session recovery.
Implements intelligent context selection that includes only relevant previous messages in API requests rather than sending entire conversation history, reducing token usage and latency while maintaining coherence; stores history locally in browser storage for offline access and session recovery
More efficient than ChatGPT's default behavior of including full conversation history because it uses semantic relevance filtering; more convenient than external note-taking because context is automatically maintained within the same interface
multi-provider llm switching
Medium confidenceAllows users to toggle between Claude and ChatGPT APIs within the sidebar interface, with separate API key configuration for each provider. Implements provider abstraction layer that normalizes request/response formats across different API specifications (Anthropic Messages API vs OpenAI Chat Completions API) and maintains provider preference in user settings.
Implements provider abstraction that normalizes API differences between Anthropic and OpenAI, allowing seamless switching without requiring users to understand different API specifications; maintains separate API key configuration per provider in extension settings
More flexible than single-provider tools because it allows leveraging strengths of different models; more convenient than managing separate browser tabs for each provider because switching happens within the same interface
context menu integration for quick access
Medium confidenceRegisters context menu items (right-click menu) that trigger specific Sider actions like 'Summarize Page', 'Explain Selection', 'Analyze Image' without requiring sidebar interaction. Implements Chrome context menu API integration with dynamic menu item registration based on selected content type (text, image, link) and passes context directly to sidebar for processing.
Integrates with Chrome's native context menu API to provide one-click access to Sider features without requiring sidebar interaction; dynamically registers menu items based on content type (text vs image) for contextual relevance
Faster than opening sidebar manually because context menu is always available; more discoverable than keyboard shortcuts for casual users
Capabilities are decomposed by AI analysis. Each maps to specific user intents and improves with match feedback.
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Best For
- ✓researchers and students reviewing multiple sources quickly
- ✓professionals scanning news and documentation sites
- ✓non-technical users wanting AI assistance without leaving the browser
- ✓students learning from technical or academic content
- ✓non-native speakers reading content in English
- ✓developers understanding unfamiliar code or documentation
- ✓anyone needing quick clarification without leaving the page
- ✓professionals writing emails and business communications
Known Limitations
- ⚠Cannot summarize content behind paywalls or login walls that block DOM access
- ⚠JavaScript-rendered content may not be fully captured if page rendering completes after initial DOM parse
- ⚠Large PDFs embedded as iframes may not be fully extracted depending on CORS policies
- ⚠Summarization quality depends on underlying LLM model choice (ChatGPT vs Claude)
- ⚠Cannot reliably select text from shadow DOM or web components without special handling
- ⚠Selection detection may fail on pages with aggressive event capturing or preventDefault calls
Requirements
Input / Output
UnfragileRank
UnfragileRank is computed from adoption signals, documentation quality, ecosystem connectivity, match graph feedback, and freshness. No artifact can pay for a higher rank.
About
AI sidebar extension for Chrome that provides ChatGPT and Claude-powered assistance while browsing. Features include page summarization, selected text explanation, writing assistance, image analysis, and PDF reading with conversation history.
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