Data month 2026-08

Flowblock

Name: Flowblock
Author: Flowblock

Office & Collaboration

Collaboration AI Design

FlowblockFlowblock opens Excalidraw and draw.io editors inside Notion and saves every diagram as a native Notion image block you can reopen and edit later.

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According to AlphaMoat, as of 2026-08, the Chrome extension Flowblock has 42 users (+44.8% MoM) — ranked #5,715 of 9,793 AI browser extensions, and #1,189 of 1,926 in Office & Collaboration.

Users · 2026-08

42+44.8%

Rating

Overall Rank (9,793)

#5,715

Office & Collaboration Rank

#1,189/ 1,926

What is Flowblock

Product Overview

Notion has no diagram block, so Flowblock supplies one. Click the floating button on any Notion page and a full Excalidraw or draw.io editor opens over the document; on save the diagram lands in the page as a native Notion image block that survives uninstalling the extension, and hovering a saved diagram gives an Edit button back into the editor where you left off. The two editors are switchable per diagram: Excalidraw for hand-drawn sketches and brainstorming, draw.io for UML, BPMN, ER, sequence, class and network topology. Flowblock also adds an Import button to every Mermaid block, so a flowchart Notion AI returned as code can be parsed in one click and reopened for visual editing. Diagrams upload to your own Notion workspace, and nothing is stored on Flowblock servers.

Key Features7 items

01Floating Add Diagram button on any Notion page
02Excalidraw and draw.io editors, switchable per diagram
03Diagrams saved as native Notion image blocks that survive uninstall
04Hover and Edit to resume where you left off
05Import button on every Mermaid block, including Notion AI output
06draw.io libraries for UML, BPMN, ER, sequence, class and network topology
07Uploads to your own workspace via your Notion token

Business Model

Pricing is published: Free forever covers 5 drawings per month, while Pro is $4.99/month or $44.99/year (3 months free). Pro removes the cap and adds version history with rollback, multiple Notion workspaces and priority support.

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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

Excalidraw - hand-drawn style. Perfect for sketches, brainstorming, casual whiteboard moments.
draw.io - rigorous and technical. UML, BPMN, ER, sequence, class, network topology, the full shape libraries.

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

Unlimited drawings - the free plan includes 5 drawings per month (Mermaid imports count toward that bucket); Pro removes the cap.
Version history with one-click rollback - every save snapshots the last versions inside the diagram. Restore any of them in one click.
Multiple Notion workspaces - connect personal, team, and client workspaces and switch between them from the extension menu.
Priority support.

PRICING

Free forever - 5 drawings per month, both editors, Mermaid flowchart import, native Notion blocks.
Pro - $4.99/month or $44.99/year (3 months free). Unlimited drawings + version history + multi-workspace + priority support.

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