Spatra

Turn the web into your knowledge space. Highlight, annotate and keep thoughts anchored to what you read.

What’s New in 1.0.0.3 - Give your preset and custom highlight colors names that are meaningful to you. - See those names in color pickers, filters, and tooltips throughout Spatra. - Keep color names synchronized safely across your devices. - Improved settings reliability and compatibility across extension versions. Every day we read articles, documentation, research papers, and PDFs — but our thoughts usually end up separated from what created them. You find a great paragraph, switch to a notes app, paste a link, type something. Months later the note is still there and the reason you saved it is gone. Spatra brings the missing layer back to the web. Highlight a paragraph, write a note beside it, draw on a diagram, connect ideas together, and come back later without losing the original context. BUILD YOUR KNOWLEDGE LAYER • Attach notes directly to paragraphs, pages, and PDF documents • Highlight text in 5 preset colors, or any custom color you pick • Write thoughts beside the exact content that inspired them • Draw, sketch, add arrows, boxes and text, and annotate diagrams • Capture a selected region of the page, or paste an image straight onto it • Link notes and documents together with [[wiki-links]] • See how your ideas connect, as a graph, in the Spatra web dashboard • Search across everything you have ever highlighted or written READ AND ANNOTATE PDFs Open PDFs in Spatra's built-in viewer: right-click a PDF link on the web and choose "Open in Spatra PDF viewer", or open a file from your computer with the file picker, or drag and drop it in. Highlight text, draw on pages, add notes, and jump back to any annotation later. Your learning materials become part of your personal knowledge system. YOUR NOTES BELONG TO THE CONTENT, NOT THE POSITION Websites redesign. Paragraphs move. Spatra re-finds your highlight by its content, not by a fragile scroll position. If a passage truly disappears, your note is not deleted — it lands in "Orphans" with a snapshot of the original text, the heading it lived under, and where it came from. You never lose what you wrote. CONNECT IDEAS ACROSS THE WEB Link a highlight from an article to a PDF page, to another site, or to your own thoughts, using [[wiki-links]] right inside your notes. What you read stops being a pile of separate pages and starts being a personal knowledge graph. Open the Spatra web dashboard and you can see that graph laid out visually — click any point in it to land back on the exact passage it came from. The dashboard is also where you share an annotated page with someone else. YOUR KNOWLEDGE, YOUR DEVICE Everything works offline and is stored locally on your device by default. No account required to start. Export any time to JSON, Markdown, or Anki decks, or sync two-way with your Obsidian vault (requires Obsidian's free Local REST API plugin — Options walks you through connecting it, step by step). OPTIONAL CLOUD SYNC (paid subscription) Sync across devices, open the web dashboard with its search and graph view, and share an annotated page with others via a public link. Search inside the extension itself always works offline, on everything stored on this device. Your local data keeps working exactly the same whether you subscribe or not — and if a subscription ends, everything stays readable and exportable. PRIVACY We do not collect your browsing history. No ad trackers, and we never sell data. Cloud sync is off by default, and while it is off, nothing leaves your device at all — not your notes, not the pages you read. Turn it on and we store only your own annotations: the text you highlighted, your notes and drawings, and the title and address of the page they belong to, so they can reach your other devices. The pages themselves are never uploaded, and pages you never annotated are never touched. Full policy: https://spatra.app/privacy