CORS Helper

CORS Helper

Lightweight CORS web development tool allows developers to modify Ajax responses Access-Control-Allow-Origin:*.

What is CORS Helper?
The 'CORS Helper' is a potent Chrome extension designed for developers. It facilitates the modification of Ajax responses through the adjustment of Access-Control-Allow-Origin:*. This means that developers can set varying return values to enable user access to specified resources from different source servers. Custom values for HTTP response headers can also be set up. CORS Helper also provides a feature for specific origin setting, like http://localhost:3000. Once installed, it's easy to enable the 'cross-source resource sharing' feature by clicking the icon in the top right corner.
By: Atom
Users: 4,000+
Rating: 3.67 (3)
Version: 1.2.2 (Last updated: 2019-06-14)
Creation date: 2019-06-11
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 2
  • storage
  • webRequest
  • <all_urls>
  • webRequestBlocking
Size: 69.00K
Stats date:

Other platforms

Not available on Firefox
Not available on Edge
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Users can set different return values to allow users to be granted access to specified resources from different source servers. Users can customize the value of the HTTP response header

It should be noted that when Access-Control-Allow-Origin is set to "*", the identity certificate cannot be attached. Of course you can specify a unique Origin such as http://localhost:3000

Instructions After installing the plugin, click the icon in the upper right corner to enable "cross-source resource sharing".

Custom configuration After installing the plugin, click the icon in the upper right corner and click "Customize" to enter the configuration page.

The "HTTP Response Header" page allows you to add custom Access-Control-* header information to the HTTP response header "White List" page allows you to customize the website for applying rules

User reviews
not working, try this one
by Bryan Tan Bryan Tan, 2023-06-11

only extension that worked
by behrad jafari behrad jafari, 2020-09-07
View all user reviews
Risk impact

CORS Helper is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this extension. Review carefully before installing. We recommend that you only install CORS Helper if you trust the publisher.

Risk likelihood

CORS Helper has earned a good reputation and can be trusted.

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