Convert Mermaid diagrams to high-quality PNG images with a browser-native tool. Paste Mermaid code, preview flowcharts or sequence diagrams instantly, choose theme, background, and export scale, then download a PNG for docs, slides, and bug reports—without uploading your diagram source to a conversion server.
Examples
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Background
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Updates
Recent changes shipped to the Mermaid to PNG 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 PNG converter for quickly turning Mermaid diagram code into downloadable image files.
Mermaid rendering and PNG export run in your browser. No server-side conversion is required for the core workflow.
Choose 1x, 2x, 3x, or 4x export scale for sharper diagrams in docs, slides, reports, and blog posts.
Paste your Mermaid code into the editor.
Check the live diagram preview.
Choose a theme, background, export scale, and file name.
Click Download PNG.
Invalid diagrams show a render error. Fix the code using Mermaid syntax rules before exporting.
A PNG is pixels. Keep your original Mermaid text if you need to revise the diagram later.
Huge node counts or extreme export scales can slow low-memory devices. Try a lower scale or simplify the graph.
Comments, multiplayer cursors, and cloud diagram libraries belong in dedicated architecture tools; this page focuses on fast export.
Mermaid to PNG is for destinations that will not execute Mermaid code blocks: many chat apps, older wikis, slide templates that only accept raster images, and bug trackers that strip live diagram syntax. Paste valid Mermaid, confirm the live preview, choose theme and background, pick an export scale, then download a PNG you can attach without asking reviewers to install a preview extension.
Keep the original Mermaid text beside the PNG. A raster file is a snapshot; if the architecture changes next week you will edit the text and re-export rather than redraw pixels. Prefer Mermaid to SVG on the same site when the destination allows vectors and you need crisp scaling for print or zoomable docs.
High export scales (3x–4x) help projectors and retina slides, but huge graphs plus 4x can slow a low-memory tab. Simplify nodes or drop to 2x if rendering stalls. Invalid syntax surfaces as a render error—fix the code before blaming the exporter.
Light themes with white or transparent backgrounds usually read best in printed handouts. Dark themes help screenshots destined for dark-mode docs. Transparent PNGs drop cleanly onto branded slide masters; opaque white backgrounds avoid odd checkerboard previews in some email clients.
Name the diagram when you juggle multiple flowcharts in browser tabs so sequence versus ER exports stay distinguishable. The core render and download path stays in the browser with Mermaid and Canvas—you do not need to upload diagram source to DK-JS servers to get a PNG.
Export Mermaid flowcharts as PNG when a repository host or wiki expects a raster image instead of live Mermaid rendering.
Drop sequence or state diagrams into decks for audiences who will not install a Mermaid preview extension.
Attach a PNG of an ER or class diagram so reviewers see the same snapshot you intended.
Publish diagram images on platforms that do not execute Mermaid code blocks natively.
Bundle a static system map PNG with checklist docs when you cannot rely on live Mermaid in the onboarding CMS.
Export a compact flowchart of mitigation steps that paste cleanly into Slack or Teams without plugins.
Mermaid rendering and PNG export for the core workflow run with client-side Mermaid and Canvas. You do not need to upload diagram source to DK-JS servers to download a PNG.
If you paste proprietary architecture text, keep the tab on a trusted device and clear it when finished.
Mermaid to PNG means converting text-based Mermaid diagram code into a PNG image file that you can download and use in documents, slides, websites, and reports.
No. The core rendering and PNG export flow runs in your browser with Mermaid and Canvas.
Yes. Choose the Transparent background option before downloading the PNG.
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.
Choose PNG when the destination only accepts raster images (many chat apps and some CMS fields). Choose Mermaid to SVG when you need infinite scaling, CSS-friendly vectors, or print-quality sharpness.
Core rendering and PNG download run in your browser. Avoid pasting secrets into diagrams on shared machines, and prefer SVG/PNG downloads over screenshots when you need a clean asset.
