Web Font Subset Generator – Reduce Font File to Only Used Glyphs
Paste the characters your site uses and upload a TTF/OTF font. Download a smaller, subsetted WOFF2 for faster page loads.
UD5 Toolkit
Paste the characters your site uses and upload a TTF/OTF font. Download a smaller, subsetted WOFF2 for faster page loads.
Enter the characters you need and generate a smaller font file from a TTF/OTF. Keep only the glyphs you use. Using harfbuzz WASM.