ER Architect KOI-8

ER Architect KOI-8 font by Gavin Helf is a free handwritten font that captures the neat, upright rhythm of architectural lettering. Its fine, even strokes feel like they were drawn with a precise technical pen—loose enough to read as human, but orderly enough to stay clean in notes, diagrams, and dense layouts. Letters sit tall and narrow with generous spacing, so even long strings of text stay airy instead of cramped.

Using ER Architect KOI-8, you get that “sketched on tracing paper” vibe that works beautifully for wireframes, UI annotations, moodboards, process diagrams, captions, and creative briefs. This free font also shines on concept posters and minimalist covers where you want a smart, slightly nerdy handwritten voice instead of messy script. Pair it with a simple geometric sans for body text and let ER Architect KOI-8 handle headings, side notes, and callouts at medium sizes for crisp readability.

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