A structured canvas for words, code, and diagrams — where people and agents build shared understanding, together or offline.
This is the editor. Click anywhere and try it — nothing is saved.
Visual storytelling
When context can be seen — not merely described — humans and agents reach shared understanding sooner and act with confidence.
Words explain the detail; diagrams reveal the shape. Together they turn abstract thinking into a story people can see, follow, and remember.
Everyone works from the same visual narrative — the goal, constraints, rationale, and open questions — instead of reconstructing context in parallel.
When the whole story is easy to grasp, decisions land faster. Discussion, ownership, and next steps stay connected as the work moves forward.
The experience
Sidenote feels as simple as a blank page and as polished as the ideas you want people to remember.
Every page is calm, fast, and thoughtfully set. The interface gets out of the way so the idea — not the tool — holds attention.
Open a page and begin. Familiar Markdown, gentle shortcuts, and sensible defaults make Sidenote feel natural without a setup ritual.
Add architecture, flows, sketches, and sticky notes exactly where they clarify the story. No exports, embeds, or context-switching.
Give assistants and coding agents permission-aware access to the full narrative. They understand the rationale, then make attributable updates.
Write, draw, and refine the same page at once. Presence and live cursors make collaboration clear without turning the page into a control panel.
Comment on a word, block, image, or shape. Discussion stays beside the detail it clarifies and disappears cleanly when resolved.
Read, think, and edit with zero connection. Changes merge when you're back, so the experience feels the same with or without a green dot.
People and agents leave a clear, attributable trail automatically. Durable Markdown keeps the result portable, useful, and yours.
Bring people, agents, words, and visuals into the same story — and keep it moving wherever work happens.