SparkChart for PlantUML and Mermaid rendering in the browser. Create, visualize, and edit diagrams with AI assistance.
Users
549
+10 in 30 days
Rating
3.5 / 5
unchanged in 30 days
Ratings
2
0 in 30 days
Store rank
#41K
#35K among extensions
Version
1.0.0
updated 15 Jan 2026
Users
monthly, 9 months
Latest, 15 Oct 2026:549 usersMove the mouse over the chart for any month
Ratings count
monthly, 9 months
Latest, 15 Oct 2026:2 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About SparkChart: PlantUML & Mermaid Renderer
SparkChart: The Ultimate Text-to-Diagram Workspace
SparkChart is a lightweight, high-performance extension for developers, architects, and technical writers who want to build professional diagrams without the friction of drag-and-drop tools. By treating "Diagrams as Code," SparkChart allows you to render complex visualizations instantly using industry-standard syntax.
## Dual-Engine Support
PlantUML: Create robust, UML-compliant sequence diagrams with a dedicated live editor and real-time preview.
Mermaid.js: Full support for all Mermaid charts, including Flowcharts, Gantt charts, Entity Relationship Diagrams (ERD), Mind Maps, and User Journeys.
## Key Features
Live Rendering: Watch your diagrams update in real-time as you type your code.
Professional Templates: Kickstart your project with built-in snippets for common architectural patterns.
High-Quality Export: Save your work as SVG or PNG files for seamless integration into GitHub, Jira, Notion, or your internal documentation.
Privacy-First: Your diagram code stays in your browser. No external accounts or cloud storage required.
## Future-Ready with Local AI SparkChart is built for the next generation of web browsing. We have integrated a powerful AI assistant designed to generate diagrams from natural language prompts and automatically refactor your chart logic.
Note: These AI features are currently deactivated. They will be automatically enabled as soon as Google Chrome rolls out official support for Gemini Nano (Built-in AI) on your device. This ensures the AI runs entirely locally on your machine, keeping your data 100% private.
Stop drawing. Start coding. Ignite your documentation with SparkChart.