Contact form echo

Fill the form in. It validates the three fields and shows you back exactly what would be sent on — and what was cleaned up to get there. Nothing is stored and nothing is emailed.

What gets cleaned

All three fields: surrounding whitespace is trimmed, and invisible characters (zero-width spaces, soft hyphens) that ride along on a paste are removed.
Name: put on one line, repeated spaces collapsed. Casing and spelling are never touched.
Email: mailto: and <angle brackets> are stripped, and the domain is lower-cased. The part before the @ keeps its casing — it is case-sensitive by the standard.
Message: line endings normalised, trailing spaces removed, runs of blank lines collapsed to one. Paragraphs and indentation survive.

Limits: name 100 characters, email 254, message 5000. There is a JSON API at POST /api/echo and a health check at /healthz.