Threadmark

Threadmark is a browser extension designed to help users save, organize, and enhance important moments from their AI conversations in ChatGPT and Claude. Addressing the challenge of losing valuable insights within lengthy chat sessions, Threadmark provides a workspace layer that allows individuals to capture either full responses or specific passages without leaving the conversation. Users can return to the original message for context, ensuring that meaningful outputs are easily retrievable even across long sessions.

The extension offers several features to improve and manage saved content. With Lenses such as Deep Dive, Sharpen, Challenge, and Package, users can refine their saved outputs directly within the tool. Threadmark enables the organization of ideas into folders, supporting project workflows and helping prevent scattered notes. When work is ready to share, users can export their polished content as a clean PDF, eliminating the need for manual copy-paste cleanup. The tool supports a cross-AI workflow, allowing users to save content in one platform and continue refining it in another, while maintaining source context and version history.

Threadmark is aimed at individuals who use AI as a working environment, including builders tracking decisions and reusable answers, writers and researchers preserving drafts and source material, and developers capturing code explanations and implementation notes. It is available as a free-to-start extension for Chrome and Firefox, with no account required and a local-first design. The free tier includes 5 saves and 3 Lens runs, while a one-time $5 payment unlocks unlimited saves, unlimited Lens runs, folder organization, and lifetime access to all features. Users always retain access to their saved data regardless of tier.

By providing a unified memory layer across ChatGPT and Claude, Threadmark streamlines the process of capturing, improving, and exporting valuable AI-generated content for ongoing projects and reference.