Corsfix is a secure CORS proxy service and open-source platform that lets developers fetch data from any API directly in client-side JavaScript without CORS errors.

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🚀 Overview

Corsfix eliminates CORS (Cross-Origin Resource Sharing) errors by acting as a proxy: it fetches resources from any URL on behalf of your client-side app and adds the required CORS headers to the response.

This solves the problem of browsers blocking cross-origin requests to APIs that don't permit them—common in development, static sites, and production SPAs without a backend proxy.

It's built for frontend developers, indie makers building static websites, and teams needing quick API access without server-side changes. The creator built it after repeatedly hitting CORS issues while developing static sites, providing both a hosted service (free trial) and self-hostable open-source version for privacy (no request logs).

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✨ Key Features

• Proxy any HTTP method (GET, POST, PUT, DELETE) and content type (JSON, HTML, images, etc.) to bypass CORS restrictions (essential for dev/prod workflows)
• Securely pass custom headers and hide API keys from client exposure
• Response caching and streaming for minimal latency and high performance (>99.9% uptime)
• Origin/domain allowlists, forbidden headers control, performance metrics tracking
• Optional: Upcoming self-hosting enhancements and playground testing

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🛠 Tech Stack

• Backend: TypeScript (Node.js)
• License: AGPL-3.0
• Deployment: Self-hosted or managed via Cloud infrastructure
• Docs: Full self-hosting guide at corsfix.com/docs

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👥 Who Is This For?

This project is useful for:

• Developers who want to test/fetch external APIs without CORS setup
• Teams looking for a secure, low-latency proxy without logging PII
• Indie makers building static sites/SPAs needing quick API integration

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📸 Screenshots / Demo

• Live demo: https://app.corsfix.com/playground
• GitHub: https://github.com/corsfix/corsfix

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Freemium — Free trial with all features (no credit card), hosted production plans; fully free open-source self-hosting.

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Is the source code available?

Yes — https://github.com/corsfix/corsfix

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Can I contribute?

Yes — Review CONTRIBUTING.md, open issues/PRs, or provide feedback on GitHub/Discord.

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📬 Contact & Links

• Website: https://corsfix.com (also https://blockedbycors.dev)
• GitHub: https://github.com/corsfix/corsfix
• Discord: https://discord.gg/WEAeqrRjp2
• Email: hello@corsfix.com

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