CORS Unblock

No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled

CORS Unblock is a powerful Chrome extension designed to eliminate CORS (Cross-Origin Resource Sharing) errors by appending and modifying HTTP headers such as Access-Control-Allow-Origin and Access-Control-Allow-Methods for local and remote web requests. Simply activate it via the action button to bypass XMLHttpRequest and fetch rejections, facilitating seamless cross-origin API calls during development.

Beyond fixing CORS issues, this extension offers advanced features like removing Content Security Policy (CSP) headers, overwriting 4xx server responses to simulate supported methods, enabling SharedArrayBuffer support, allowing cross-origin iframe embedding by removing X-Frame-Options, and customizing sensitive headers like referer and origin. It optionally leverages Chrome's debugging API to fix redirected URLs and preflight requests, making it an essential tool for developers working with complex web applications and cross-origin resource access.

Manifest V2
By:
Bermet
Rating:
4.30
(12)
Version:
0.3.8 (Last updated: 2024-02-11)
Creation date:
2021-04-06
Permissions:
  • storage
  • <all_urls>
  • webRequest
  • webRequestBlocking
  • declarativeNetRequest
  • contextMenus
  • debugger
Size:
202.43K
Full description:
See detailed description
Updated:
a day ago

Other platforms

CORS Unblock (v0.3.8)
7,096+ 3.91 (33)

User reviews

Pros
  • Easy to use
  • Effective
  • Works fine
  • Savior for development work
Cons
  • Does not work with local file:// javascript
Recent reviews
使用方便,有效!
by SeaRat, 2024-07-29

this worked for me, but you need to click it for it work.
by bread, 2023-11-12

Does not work in the slightest. Bummer! Still have to manually disable CORS for dev work, then re-enable it. Anyone have a working plugin?
by Dave, 2022-06-05
View all user reviews

Extension safety

Risk impact

CORS Unblock requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows for debugging of other web apps and extensions, which can intersect with sensitive information and security boundaries.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
Risk likelihood

CORS Unblock has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
Upgrade to see full risk analysis details

Promo images

CORS Unblock marquee promo image
Marquee promo image
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