This page can be saved and run localy or from some online source.
It performs a window.fetch() request to a remote source.

Features:

• URI protocol can be HTTP as well as HTTPS.
  HTTPS is mandatory when the actual source location is HTTPS.
• Caching is excluded
• An authorization can be included
• Multiple custom request headers can be included
• Recall last used URI also when changing Method
• When browser localStorage is available:
  • Recall last Request parameters
  • Bookmarks management

This tool can be useful to check:

1. URI response status and headers
2. Total time elapsed for the response
3. CORS preflight and accessibility

Don't forget that preflight request (method “OPTIONS”) can return a 200 as well a 204 status, but this isn’t enough.
An “Access-Control-Allow-Methods” header is expected, valued with the same method of the request (optionally listed in a comma-separated list of Methods).

© 2023 M. Balestra