About This Site
Mermaid Live Editor is a free online diagram tool that lets you write Mermaid code in the browser and preview it instantly.
What We Offer
A split-pane editor: code on the left, live preview on the right. Supports flowcharts, sequence diagrams, gantt charts, class diagrams, state diagrams, ER diagrams, pie charts, mind maps, timelines, and more. Switch themes, enable hand-drawn style, zoom and pan the preview, and export SVG or PNG.
Who Runs This Site
Maintained by HelloCoder (baimuxym.cn) for developers, product managers, and technical writers who want diagram-as-code without friction. The site is available in Chinese, English, and Japanese, with a Mermaid tutorial.
How to Use
Open the editor and start typing—no sign-up or install required. Load examples from the template dropdown or read the guide for syntax help. Your diagram source is processed locally in the browser; we do not upload it to our servers.
Contact
Questions, feedback, or partnership inquiries: reach us via the HelloCoder blog at https://learnjava.baimuxym.cn/. You can also scan the WeChat Official Account QR code below.
Contact via WeChat Official Account
