Convert Town
convert.town
A pile of one-click converters that never upload the file
transfonter.org
Turns a TTF or OTF into WOFF2 with the @font-face CSS written for you.
Upload a desktop font and it returns a zip containing the web formats, a stylesheet with the @font-face rules already filled in, and an optional subset so a Latin-and-Cyrillic family does not ship 300 KB of glyphs nobody will read. It also generates a preview page so you can check rendering before committing. It converts whatever you give it and asks no questions about licensing.
AltFTool does this too
If you would rather not leave the site, Font Subsetter & WOFF2 Converter covers the same job here — free, no account, and it runs in your browser.
Open Font Subsetter & WOFF2 ConverterQuestions
Works the moment the page loads. No account, no email, no trial. It will happily convert a font you have no right to serve on the web — the licence check is entirely yours.
Yes. Transfonter sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
It will happily convert a font you have no right to serve on the web — the licence check is entirely yours.
Alternatives
Same category or same task, ordered by how closely they overlap.
convert.town
A pile of one-click converters that never upload the file
ezyzip.com
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rapidtables.com
Unit, number-base and colour conversions with the formula written underneath
svgco.de
Traces a PNG or JPEG into a scalable SVG inside the browser
tinywow.com
A couple of hundred small file tools, free and with no account
pandoc.org
Converts between Markdown, LaTeX, DocBook, reStructuredText and dozens more