Checkpointer

Bookmark any passage on any page and jump back to it instantly — even as the page grows.

Checkpointer lets you pin exact passages on any webpage and return to them with one click — no matter how long the page gets. How it works Open any page and the Checkpointer panel appears automatically. Click "Pick a point", hover over any passage, and click to save it. Your checkpoint is stored on your device and stays pinned to that exact text — even if new content loads above it. Perfect for - Long articles and blog posts you read in multiple sittings - AI chat threads (ChatGPT, Claude, Gemini) that grow with every message - Research — bookmark key paragraphs across multiple pages - Documentation and tutorials you keep coming back to Features - Saves checkpoints per page, stored locally on your device - Jump back to any saved passage instantly - Rename checkpoints to keep things organised - Drag the panel anywhere on screen so it stays - Close it with the × button or press Escape; reopen with Alt+Shift+C - Works on single-page apps that update without Privacy Everything is saved locally on your device. No data is ever collected, transmitted, or shared.