Manually changing headers or request bodies to see how an API responds to different inputs.
For developers who prefer a solution that doesn't require installing any extensions, Google Chrome has a powerful built-in feature: . tamper data chrome
If you need to modify outgoing requests on the fly (like changing POST parameter data before it hits the server), native DevTools can be limiting. These Chrome extensions fill the gap left by the original Tamper Data tool. Manually changing headers or request bodies to see