Customization

SealCanvas exposes most visual properties so you can override preset defaults without building a custom template.

Common Properties

Prop	Type	Description
text	string | string[]	Seal text. String renders vertically by character; array renders rows.
color	string	Seal ink color.
size	number | { width, height }	Canvas size. Number means square.
shape	"circle" | "square"	Outer shape.
border	"single" | "double" | "none"	Border style.
borderThickness	number	Border line thickness.
cornerRadius	number	Corner radius for square seals.
fontFamily	string	Registered font family name.
textDirection	"horizontal" | "vertical"	Text flow direction.
invert	boolean	White text on colored background (shubun effect).
bleed	boolean	Adds an ink-bleed texture effect.
previewScale	number	Scales the preview on screen without changing export size.

Color Example

<SealCanvas preset="mitomein" text="山田太郎" color="#8b0000" />

Square Seal with Rounded Corners

<SealCanvas
  preset="kakuin"
  text="株式会社サンプル"
  shape="square"
  cornerRadius={12}
/>

Inverted (Shubun) Style

<SealCanvas preset="mitomein" text="山田" invert />

Ink Bleed Effect

<SealCanvas preset="tenkoku" text="雅印" bleed />

Low-Level Customization

If the built-in props are not enough, use SealRenderer with a fully custom SealTemplateConfig. See the SealRenderer documentation.