Slides and decks
Use transparent PNG when the diagram needs to sit on a branded slide, dark section, or presentation card without a white box.
PNG export · safest sharing format
Free Mermaid to PNG Converter
Paste Mermaid code, preview it instantly, then export a clean PNG for slides, README files, blog posts, issue trackers, and documentation. PNG is the safest default when the diagram must look exactly as exported.
No signup · No watermark · Local browser rendering · Transparent background · 1x / 2x / 4x output
Paste or edit Mermaid code
Replace the sample below, or load another example.
Load example
Paste Mermaid code here. Preview and export load locally in your browser.
Live previewSample preview · GitHub README
Render & export
Export controls activate after your diagram renders locally.
Flowchart
Mode
Default renderNative MermaidOptimized exportStyled download
Export style
Clean DocsGitHub READMENotion DocWhiteboard SketchTransparent DocsGitHub DarkLinear DarkTokyo NightSlide TransparentSlide DarkExecutive DeckEditorial Card
Scale
1x2x4x
Output: White · comfortable padding
Size: calculated after render
Filename: mermaid-flowchart-white-2x.png
Why PNG is the primary Mermaid export format
PNG has the broadest destination support for Mermaid diagrams. It works in slide decks, GitHub issues, CMS editors, email builders, Word documents, README files, and internal docs without requiring the destination platform to understand Mermaid or allow SVG.
README and docs
PNG is the safest fallback for documentation systems that do not render Mermaid consistently or block inline scripts.
Blogs and issue trackers
Export at 2x or 4x so labels and arrows stay readable after CMS resizing, social previews, or ticket attachments.
PNG export checklist
Need transparency?
Choose a transparent preset before exporting. PNG preserves alpha; JPG flattens the background.
Need sharp text?
Use 2x for normal docs and 4x for presentations, retina screenshots, or large cards.
Need smaller web files?
Use PNG for compatibility, then switch to WebP when the target is a modern website and file size matters.
FAQ
Questions about this Mermaid export workflow
Can I export a Mermaid diagram as PNG without a watermark?+
Yes. The PNG exporter is free for single-diagram use and does not add a watermark to the exported image.
Can the PNG have a transparent background?+
Yes. Use a transparent export preset and download PNG. The checkerboard preview is only a visual aid; it is not drawn into the exported file.
Why does my Mermaid PNG look blurry after uploading?+
Most platforms resize images. Export at 2x for documentation and 4x for slides or retina displays so text and connectors stay sharp after scaling.
Should I choose PNG, SVG, JPG, or WebP?+
Choose PNG for maximum compatibility, SVG for vector workflows, JPG for legacy upload forms, and WebP for modern web pages where file size matters.