Mermaid to PNG
Drop in a Mermaid diagram or paste the code directly, and download a crisp PNG. PNG is the best raster format for diagrams — lossless, transparent background optional, works everywhere. The diagram is rendered to SVG then rasterized at up to 4× the native size for sharp output on retina displays and print. Rendering runs locally in your browser — your source never leaves your device.
Drop .mmd / .mermaid file here
or click to choose
Options
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Supports
.mmd, .mermaid → .png
Related tools
Tools that work with the same formats — most users open one of these next.
Image Cropper
Crop any image (PNG, JPG, WebP, GIF, BMP, AVIF) right in your browser — drag a box, hit crop.
PNG Cropper
Crop PNG images in your browser — keeps transparency, lossless output, no upload.
Image to Grayscale
Convert any image to grayscale — pick the algorithm, runs entirely in your browser.
Image to Black & White
Convert an image to pure black & white using a threshold — runs in your browser.
Image to Sepia
Apply a classic sepia tone to any image — adjustable intensity, runs in your browser.
Invert Image Colors
Invert (negate) the colors of any image — runs entirely in your browser.
Frequently asked
Is Mermaid to PNG free to use?
Yes. Mermaid to PNG is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Mermaid to PNG runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Mermaid to PNG work?
Open Mermaid to PNG, drop in your MMD, MERMAID file, choose any options, and click Convert. Your browser does the work locally and produces a PNG file you can save right away.
What's the maximum file size for Mermaid to PNG?
Because Mermaid to PNG runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.