Turn AI‑generated flowcharts into editable diagrams.
Edit your Notion AI Mermaid blocks with Excalidraw and draw.io — without leaving your Notion page.
Excalidraw and draw.io.
Pick the right tool per diagram — hand-drawn sketches in Excalidraw, rigorous technical work in draw.io. Both save as native Notion image blocks.
Version history with rollback.
Made a change you regret? Every diagram automatically keeps its last five versions — restore any of them with one click.
Draw from scratch, too.
Not every diagram starts as Mermaid. A floating button on every Notion page opens a blank Excalidraw or draw.io canvas — sketch, save, done.
A diagram tool · for Notion power users
Notion AI to editable diagram, in three steps.
No new tab, no copy-paste, no extra service. The diagram is a real Notion image block — yours forever, even if you uninstall Flowblock.
01
Notion AI hands you a Mermaid block.
You ask Notion AI to sketch a flow. It produces a code block with mermaid at the top — a static image you can't really edit.
02
Click Import.
Hover the Mermaid block in Notion — Flowblock adds an Import button in the corner. One click parses the source and opens a real, editable diagram in the modal.
03
Edit, save — done.
Drag a node, recolor, add a label. Save and the Notion block becomes a clean Excalidraw or draw.io drawing. Reopen it any time — your edits persist forever.
watch it in action
pricing
Pay for unlimited. Get started for free.
Free covers 5 drawings a month. Go Pro when AI flowcharts become a daily habit.
Free
$0
forever
- 5 drawings per month
- Excalidraw & draw.io editors
- AI / Mermaid flowchart import
- Native Notion blocks
Pro
$4.99
/ month
$3.75
/ month
- Unlimited drawings
- Unlimited AI / Mermaid flowchart import
- Version history with one-click rollback
- Multiple Notion workspaces
- Priority support
Common questions.
Does it work with Notion AI's Mermaid diagrams?
Yes. Notion AI often emits diagrams as Mermaid code blocks, which render as a static image you can't tweak. Flowblock detects the block, parses the source, and opens it as a real, editable diagram in Excalidraw or draw.io — saved back as a native Notion block.
Can I just draw something new from scratch?
Yes. Flowblock adds a floating button to every Notion page — click it to open a blank canvas in Excalidraw or draw.io. The Mermaid import is one entry point, not the only one. Saves the same way: a native Notion image block on your page.
What happens to my drawings if I uninstall?
Nothing — they stay. Drawings live as Notion image blocks inside your workspace. Without Flowblock they're just regular images. We never store your content on our servers.
How do I connect Flowblock to my Notion pages?
Click the Flowblock icon, sign in with Notion, and pick which pages to grant access to. Pick top-level pages or whole sections — Notion extends that permission to every sub-page automatically, so new pages underneath just work without re-authorizing.
What if a page isn't authorized yet?
Clicking the Flowblock button on an unconnected page opens a dialog with a shortcut to the popup. Two things to verify there:
- The page's workspace is connected. If not, click Connect another workspace.
- The page is shared with Flowblock. In Notion: page ··· menu → Connections → Flowblock.
Granting access at a parent page extends to every sub-page underneath.
How does version history work?
Pro plans keep the last 5 versions of each drawing — embedded directly in the Notion image block, not in a separate database. Open the diagram, click Version history in the bottom-left, and restore any earlier snapshot with one click.
Does it support dark mode?
Yes. Drawings always save in light mode (so they look right for everyone), but the editor itself can match Notion's dark theme — toggle in the popup.
Notion plan tiers?
Flowblock works on Free, Plus, Business, and Enterprise — it uses the standard Notion file-upload API.
Firefox or Edge?
Chrome is live now. Firefox and Edge are in progress.
What if I cancel Pro?
Existing drawings are untouched. New drawings drop back to the Free limit (5 per month). Re-subscribe any time.
Is my Notion data secure?
Drawings upload directly to Notion's own file storage using your access token. Flowblock never stores drawing content on our servers.