Your second brain, beautifully connected.
Synapse turns scattered notes into a living map of your thinking. Link ideas with [[wiki-links]], watch them connect in the graph, and find anything in an instant — in your browser, even offline. No accounts. No cloud. Just your ideas.
Backlinks · 4
Everything a second brain needs.
Nothing it doesn't.
A calm place to think
A distraction-free writing space with slash commands, drag-and-drop nesting, and markdown shortcuts — typography tuned for long-form thinking, chrome that gets out of your way.
Type [[ to link any note, instantly.
Links that link back
Every [[wiki-link]] builds a two-way street. A backlinks panel shows who references any note.
Search that keeps up
Find any note by a word you half-remember — titles, sentences, even with typos. Highlighted matches, instantly, entirely on your device.
Daily notes & streaks
A fresh page every day. Your activity heatmap makes consistency visible — and addictive.
Yours, even offline
Everything lives on your device, not in someone's cloud. Export your whole vault as Markdown or JSON anytime — no lock-in, ever.
Watch your thinking take shape.
Every link is an edge, every note a node. Hover to isolate a thought cluster — click to dive straight into the note.