AlphaMoatによると、2026-09時点でChrome拡張機能Flowblockのユーザー数は52(前月比 +23.8%)で、9,324件のAIブラウザ拡張機能中5,387位、オフィス・コラボレーションでは1,839件中1,110位です。
Add Excalidraw and draw.io diagrams to Notion pages. Import Notion AI Mermaid flowcharts in one click. Native Notion blocks. Real diagram editors, native inside Notion.
Notion has no diagram block. You either screenshot from draw.io and paste (which breaks the moment anything changes), or you wrestle with Notion AI's Mermaid output in a code block. Flowblock fixes both.
Click the floating button on any Notion page and a full Excalidraw or draw.io editor opens right over your doc. Draw, save, and the diagram lands as a native Notion image block. Hover any saved diagram, click Edit, and you're back in the editor exactly where you left off.
TWO EDITORS, SWITCHABLE PER DIAGRAM
Both save as native Notion image blocks that survive uninstalling Flowblock.
IMPORT NOTION AI MERMAID CODE
Ask Notion AI for a flowchart and you get a Mermaid code block. Useful, until you need to rename a node or fix an arrow and you're suddenly hand-editing Mermaid syntax in a text block.
Flowblock adds an Import button to every Mermaid block in Notion. One click parses the source and reopens the diagram in Excalidraw or draw.io as something you can actually edit visually.
HOW IT WORKS
1. Hit the floating Add Diagram button on any Notion page (or hover a Mermaid block and click Import). 2. Draw, edit, or convert in Excalidraw or draw.io, right inside the modal. 3. Save. The diagram lands in your Notion page as a real image block, yours forever.
PRO FEATURES
PRICING
PRIVACY
Diagrams upload directly to your own Notion workspace using your Notion access token. We never store your diagram content on our servers. Authentication tokens stay in Chrome's local storage. Learn more: https://flowblock.app/privacy.html
WORKS WITH
Notion Free, Plus, Business, and Enterprise plans. Chrome on macOS, Windows, and Linux. Firefox and Edge support in progress.
QUESTIONS OR FEEDBACK
Email [email protected] or visit https://flowblock.app
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+ 比較データ月:2026-09 · ユーザー数と評価はChromeウェブストアの公開データを月単位で集計したものです。詳しくはデータの方法論をご覧ください。