Convert Mermaid diagrams to crisp scalable SVG images with a simple browser-native tool.
Examples
Theme
Background
Updates
Recent changes shipped to the Mermaid to SVG converter.
May 23, 2026
Added support for defining a custom diagram name, making it easier to tell multiple flowcharts apart in browser tabs.
A focused Mermaid to SVG converter for quickly turning Mermaid diagram code into downloadable vector files.
Mermaid rendering and SVG export run in your browser. No server-side conversion is required for the core workflow.
Export crisp SVG files that stay sharp in docs, slides, websites, and design workflows.
Export Mermaid as SVG so README images, Confluence pages, and print PDFs stay sharp at any zoom level.
Keep architecture diagrams as vectors when writers may resize them across templates.
Share sequence and class diagrams that remain crisp on high-DPI displays without re-exporting multiple PNG scales.
Open the SVG in a vector editor when you need minor polish after the Mermaid layout is correct.
Diagram parsing and SVG generation for the core export path happen in your browser. You do not need to upload Mermaid source to DK-JS to download an SVG file.
Treat confidential topologies like any other sensitive document displayed on screen.
Broken syntax prevents a preview. Validate diagram types supported by the Mermaid version bundled in the page.
Some platforms strip SVG uploads for security. In those cases use Mermaid to PNG instead.
Collaboration, comments, and multi-file projects belong in dedicated architecture tools; this page focuses on fast export.
Choose SVG when the diagram will be resized across README pages, wikis, slide templates, or print PDFs and must stay sharp at every zoom level. Vector paths keep flowcharts, sequence diagrams, and class diagrams crisp on high-DPI displays without exporting multiple PNG scales. SVG is also handy when a writer or designer may need light post-edits in a vector editor after the Mermaid layout is already correct.
Prefer PNG instead when the destination rejects SVG uploads for security, when a chat app only accepts raster images, or when you need a flat snapshot that will never be edited as vectors. DK-JS also offers a Mermaid to PNG tool on this site for those cases—use the format that matches the destination, not a third-party brand name.
Paste valid Mermaid source into the editor (or load an example), wait for the live preview, then pick a theme and background. Transparent backgrounds work well for docs with their own page color; white or dark backgrounds help when the host page has poor contrast. Set a clear file name so downloads stay organized when you export several diagrams in one sitting. Finally click Download SVG and keep the original Mermaid text nearby if you expect to revise the graph later—SVG is the rendered result, not a substitute for source control of the diagram code.
Custom diagram names help when multiple previews are open in browser tabs. Themes change the look of nodes and edges for light or dark documentation systems. If the preview shows an error, fix the Mermaid syntax first; export buttons cannot invent a valid graph from broken source.
Invalid Mermaid syntax is the most common blocker—missing arrows, unsupported diagram types for the bundled Mermaid version, or markdown fences left inside the editor can all prevent rendering. Another frequent issue is uploading SVG to a CMS that strips vector files; switch to PNG for that host. Very large graphs can slow a low-memory tab; simplify subgraphs or split the diagram before exporting. Finally, do not paste secrets or proprietary hostnames into diagrams on shared machines, and clear the editor when you finish.
If the SVG looks fine in the preview but wrong in the destination, check whether the host rewrites or sanitizes SVG, or whether CSS on the page overrides fill and stroke. Re-export with a solid background when transparent SVGs disappear on dark themes. Keep expectations realistic: this page is a fast browser exporter, not a collaborative architecture IDE with comments and multi-file projects.
Mermaid to SVG means converting text-based Mermaid diagram code into an SVG file that you can download and use in documents, slides, websites, and design tools.
No. The core rendering and SVG export flow runs in your browser with Mermaid and browser APIs.
Yes. Choose the Transparent background option before downloading the SVG.
The tool is designed for common Mermaid diagrams such as flowcharts, sequence diagrams, class diagrams, state diagrams, ER diagrams, Gantt charts, mindmaps, and pie charts.
SVG stays sharp when resized and is often smaller for simple line diagrams. Use PNG if your destination blocks SVG or you need a flat image for chat tools.
The core preview and SVG download path is browser-based. Keep proprietary diagrams off shared kiosks and clear the editor when you finish.
