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ErrAlert.com
HTTP Modifications
This page lets you do some HTTP modification tests, such as different response codes, slow page loading, etc.
You can modify the HTTP response code, use this for testing. The random option will randomly return one of these response codes: 200, 201, 301, 304, 307, 308, 400, 401, 403, 404, 418, 501.
https://tools.erralert.com/http/response/404
https://tools.erralert.com/http/response/500
https://tools.erralert.com/http/response/501
https://tools.erralert.com/http/response/random


You can simulate a slow page using the Sleep command. The number is the seconds to sleep. The maximum allowed is 60 seconds.
https://tools.erralert.com/http/sleep/5
https://tools.erralert.com/http/sleep/10
https://tools.erralert.com/http/sleep/60