Page builder
Compose a page from blocks. Export a self-contained HTML file.
Save .json
Load .json
Import text/HTML
Download HTML
Editor
Appearance
Font family
Times (serif)
Georgia (serif)
Helvetica (sans)
Inter (sans)
System sans
Monospace
Base size (px)
Max width (px)
Line height
Heading weight
500
600
700
800
Body align
left
justify
center
Text color
Background
Accent / link
Inline math scale
Title
Font
(match body)
Times (serif)
Georgia (serif)
Helvetica (sans)
Inter (sans)
System sans
Monospace
Color
Align
left
center
right
Size (px)
Subtitle
Font
(match body)
Times (serif)
Georgia (serif)
Helvetica (sans)
Inter (sans)
System sans
Monospace
Color
Align
left
center
right
Size (px)
Page title
Subtitle (optional)
Add block
+ Heading
+ Paragraph
+ Molecule SVG
+ Math / Chemistry (KaTeX)
+ Reaction / Mechanism
+ Image
+ Callout
+ Divider
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