Corsfix — Free CORS Proxy to Bypass Cross-Origin Errors (No Key)

TL;DR

Corsfix is a dead-simple CORS proxy — just prepend https://corsfix.com/?url= to any URL and it will fetch the resource for you with proper CORS headers, eliminating those frustrating browser cross-origin errors. Perfect for front-end developers who need to consume third-party APIs that don't set Access-Control-Allow-Origin. No signup, no API key, no configuration.

Quick start: https://corsfix.com/?url=https://example.com

No API key needed — just make a request!

Try fetching example.com through Corsfix: https://corsfix.com/?url=https://example.com

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How to Use This API

1. Fetch Any URL Without CORS Errors

Pass your target URL as the url query parameter:

https://corsfix.com/?url=https://api.example.com/data

Corsfix fetches the resource server-side and returns it with Access-Control-Allow-Origin: * so your browser accepts it.

2. JavaScript — Vanilla Fetch via Proxy

const targetUrl = 'https://api.github.com/repos/opencode-ai/opencode';
const proxyUrl = `https://corsfix.com/?url=${encodeURIComponent(targetUrl)}`;

fetch(proxyUrl)
  .then(res => res.json())
  .then(data => console.log('Repo:', data.full_name))
  .catch(err => console.error('Fetch failed:', err));

3. Python — Same Pattern, No Proxy Needed

import requests

# Python requests don't have CORS, so use the target URL directly
resp = requests.get('https://api.github.com/repos/opencode-ai/opencode')
print(resp.json()['full_name'])

# But if you want to use Corsfix anyway:
proxy = requests.get('https://corsfix.com/', params={
    'url': 'https://api.github.com/repos/opencode-ai/opencode'
})
print(proxy.json()['full_name'])

Frequently Asked Questions

What is CORS and why would I need a proxy?: Browsers block JavaScript fetch requests to domains that don't explicitly allow cross-origin access via Access-Control-Allow-Origin headers. Corsfix acts as a middleman that adds this header to the response.
Do I need an API key for Corsfix?: No. Corsfix is completely free and requires no authentication or registration.
Are there request size limits?: There are no published limits, but very large responses (multi-megabyte files) may time out or be rejected. Corsfix is designed for typical API responses.
Can Corsfix fetch HTTPS URLs?: Yes, Corsfix supports both HTTP and HTTPS targets. Just pass the full URL including the protocol.
Is there a rate limit?: No published rate limits. However, as a free service, it's intended for development and low-volume usage rather than production-scale traffic.
Does Corsfix cache responses?: No — each request is fetched fresh. If you need caching, implement it on your end using localStorage or a service worker.

API Details

API URL: https://corsfix.com
Documentation: corsfix.com
Category: Development
Authentication: Not Required
Geographic Coverage: Global

What You Can Build

Browser-based API dashboards that consume services without CORS headers
Static site widgets that fetch dynamic content from external sources
Development tool for testing API responses directly in the browser console
HTTP request inspector that shows raw responses without browser restrictions
Quick integration of legacy APIs into modern JavaScript frontends