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Drop one TTF or two hundred. Batch conversion is not a paid feature here.
A web font is being self-hosted and the TTF is too heavy to sit in the critical rendering path.
The glyph outlines are untouched. WOFF2 wraps the same font data with Brotli compression and a transform tuned for glyph tables, typically 30 percent smaller than WOFF and far smaller than raw TTF.
Compression is not subsetting, and subsetting is where the real savings are. A full font with 3,000 glyphs stays a full font after conversion; cutting it to the Latin range you actually use often removes 80 percent of the file before WOFF2 does anything.
No. WOFF2 has been supported in every current browser for years. Serving both doubles your requests for no benefit.
No. It is the same outlines and the same hinting, in a compressed wrapper.
Possibly. Many desktop font licences do not include web embedding, and converting the file does not grant that right.
Drop one TTF or two hundred. Batch conversion is not a paid feature here.
Web Open Font Format 2 is lossless, so nothing is thrown away in the conversion.
Converted and deleted the moment it finishes. Never written to permanent storage.