At some point, Swashbuckle's generated Swagger UI changed to have a new look. When it did, the parameter inputs also lost their name attributes, which is what autofill is keyed off of in Google Chrome, so autofill stopped working in the Swagger UI. This extension dynamically adds that attribute back to those parameter inputs, so Chrome's autofill can work once again. Using this extension is simple; just click the extension's button once you're on the generated Swagger page. As long as that tab stays on the Swagger page, it will continue to work. If you refresh the page or navigate away and back again, you'll have to click the button again to turn it back on for that page. You can tell if it's working for a tab when there's a checkmark in the icon. No checkmark, no autofill.