CORS.SH Alternative

What is CORS.SH?

CORS.SH (available at proxy.cors.sh) emerged as a free alternative after CORS Anywhere restricted its public demo. Created by the Grida team, the service aims to provide “cors-anywhere-for-everyone” without the rate limits that plagued the original.

The service accepts target URLs and returns responses with proper CORS headers, enabling browser JavaScript to access cross-origin resources.

CORS.SH Usage

// CORS.SH usage
const response = await fetch(
  `https://proxy.cors.sh/${targetUrl}`
);
const data = await response.json();

CORS.SH vs CorsProxy.io

While both solve CORS bypass, they differ significantly in reliability and features:

Infrastructure: CORS.SH operates on limited infrastructure with no published SLA. CorsProxy.io uses a global edge network with 300+ locations and 99.99% uptime guarantee.

Sustainability: Free services without revenue models often disappear. CorsProxy.io has a sustainable business model with free and paid tiers.

Performance: CORS.SH response times depend on their single infrastructure. CorsProxy.io delivers sub-50ms globally through edge caching.

// CORS.SH
const url = `https://proxy.cors.sh/${targetUrl}`;

// CorsProxy.io
const url = `https://corsproxy.io/?url=${encodeURIComponent(targetUrl)}`;

Reliability Comparison

The Free Service Problem

Free CORS proxy services face common challenges:

1. Abuse: Without authentication, services get abused
2. Scaling: Traffic spikes crash limited infrastructure
3. Sustainability: No revenue means eventual shutdown
4. Support: No resources for user assistance

CORS Anywhere faced these issues and had to restrict access. CORS.SH may encounter similar problems as usage grows.

When to Use Each

Consider CORS.SH if:

• You’re in early development only
• Zero budget is mandatory
• You accept potential downtime
• You’ll migrate before production

Choose CorsProxy.io if:

• You need production reliability
• Consistent performance matters
• You want support options
• You’re building real applications