ContxtAI
ContxtAI is a free, open-source browser extension that provides a portable memory layer for AI conversations. It allows users to create reusable profiles containing personal rules, preferences, and context—such as writing style, coding standards, or audience details—and inject them into AI chats with a single click. By eliminating the need to repeatedly re-explain context, ContxtAI streamlines interactions across multiple AI platforms including ChatGPT, Claude, and Gemini. The extension is built with React, TypeScript, Plasmo, and TailwindCSS, and all data is stored locally in the browser, ensuring complete privacy with no external servers. Additional features include auto-distillation of successful prompts, a local privacy scrubber to block sensitive information, a context thermometer to visualize token usage, and context fade warnings to alert users when AI begins to forget earlier instructions.
- Category
- Productivity
- Pricing
- Free
Problem solved
Every new AI chat starts from scratch, forcing users to waste time re-entering the same background information, preferences, and rules for each conversation. ContxtAI solves this by acting as a persistent, cross-platform memory layer that injects saved context instantly, making AI interactions more efficient and personalized.
Use cases
- Maintain consistent writing tone and style guidelines across AI writing sessions
- Reuse course syllabus details and learning preferences for study-related queries
- Embed coding standards and tech stack context into developer AI chats
- Apply brand voice and campaign briefs to marketing content generation
- Store personal preferences for multiple roles (e.g., fitness coach, copywriter) and switch between them
Audience
- Content Creators
- Developers
- Hobbyists
Pros
- Works across multiple AI platforms (ChatGPT, Claude, Gemini, etc.)
- Local-first privacy with no data leaving the device
- One-click context injection saves time and effort
- Supports multiple profiles for different roles and tasks
- Free and open source with no usage limits
Cons
- Only available as a Chrome browser extension
- Manual profile creation required for new contexts
- No cross-device sync or cloud backup
- Limited to supported AI chat interfaces
- No mobile platform support
Official website: https://contxtai.vinaykolupula.workers.dev/
Canonical LambdaBase page: https://www.lambdabase.com/tools/contxtai