Either download this repository and open index.html, or try it online at https://aha-aha-aha.github.io/JsNzCovidPassVerifier/
The goal was, to create a browser based, JS based verification app for New Zealand vaccine passports. This means, no information is sent to the internet.
The app is built to the specifications of the Ministry of Health, NZ: https://nzcp.covid19.health.nz/
The certificates are currently hardcoded and need to be downloaded regularly from https://nzcp.identity.health.nz/.well-known/did.json .
NZ My Vaccine Pass Validators: https://github.com/nz-covid-pass/validator-list
The code has been created by wijay58.