(e.g., OTF, WOFF, BDF) and you want to convert that to TTF:
Let us be unequivocal: They are structurally incommensurable. A ZIP file contains a central directory, local file headers, and compressed data streams using DEFLATE or similar algorithms. A TTF contains tables ( cmap , glyf , head , hmtx , etc.) describing bezier curves, kerning pairs, and hinting instructions. file converter zip to ttf exclusive
Then I can give you an exact, safe step‑by‑step method. local file headers