mermaid.wastelands.net / v1

Diagrams, over HTTP.

Turn Mermaid source into a cacheable PNG, SVG, or JPG. Built for places that only understand an image URL—especially Google Sheets.

Open the sample SVG
render pipelineready
Flowchart showing Mermaid source moving through the API to SVG and PNG output

GET endpoint

/v1/mermaid

Percent-encode the diagram in source. PNG is the default response.

source
Mermaid source · required
format
png · svg · jpg
theme
default · neutral · dark · forest
width / height
positive pixels · max 4096
scale
raster multiplier · max 4
background
transparent or a hex colour

Google Sheets

One formula. One diagram.

=IMAGE(
  "https://mermaid.wastelands.net/v1/mermaid?format=png&source="
  & ENCODEURL(A2)
)

Sheets does not display SVG through IMAGE(), so use PNG there.