HTTP Response Error Codes

Some commonly used response error codes and their classification in broader groups.

1xx - Informational messages

2xx - Success messages

3xx - Redirection messages

4xx - Client Error responses

5xx - Server Error responses

Some examples:

200 - OK
201 - Created resource
204 - No content

300 - Multiple choices
301 - Moved Permamnently
302 - Found

400 - Bad Request
401 - Unauthorized
403 - Forbidden
404 - Not Found
405 - Method not allowed
409 - Conflict

500 - Internal Server Error

HTTP Response Error Codes - Web Dev