Small local web page that programs NFC tags through a PC/SC reader (tested with the ACS ACR1252U-M1). Type a URL or some text, put a tag on the reader, press Program.

cargo run --release        # http://127.0.0.1:7252 (port: NFC_PORT)

Browsers can't talk to a USB smart-card reader, so a small Rust server (axum + pcsc, Windows winscard) does the reader access; the page polls /api/status and posts to /api/program.
Supported tags: NFC Forum Type 2: NTAG213/215/216, MIFARE Ultralight / EV1 / C. MIFARE Classic and DESFire are detected and refused.
Input starting with http(s)://, www., tel:, mailto:, sms:, geo: or any scheme:// is written as an NDEF URI record (www. gets https:// in front); anything else as an NDEF text record (en).
The write empties the NDEF TLV first and writes its header last, so an interrupted write leaves an empty tag rather than a corrupt one. After writing, the data is read back and compared.
Bound to 127.0.0.1 only.