Code point
U+25F1
Glyph appearance depends on your fonts.
U+25F1
SoU+25F1 WHITE SQUARE WITH LOWER LEFT QUADRANT is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the Geometric Shapes block.
Choose the representation you need, then copy its value.
U+25F1
9713
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E2 97 B1
25F1
000025F1
%E2%97%B1
\u25F1
\u25F1
\u25F1
\25F1