Courseexe started as a personal project to solve a simple frustration — testing email delivery was too complicated, expensive, and privacy-invasive. It grew into a full ecosystem of free developer tools.
To build and maintain free, open-source developer tools that respect privacy, require no credit card, and work for every developer — whether you're a student side-hustling or a senior engineer debugging production. No paywalls, no ads, no trackers. Ever.
The developer community thrives on shared knowledge and open tools. Courseexe is built on open-source libraries and exists because of community support. Every donation goes directly to server hosting, SSL, database costs, and continued development — no VC money, no investors, just the community.
Every tool is designed to minimize data collection. Disposable inboxes are ephemeral. Tunnel traffic is never logged. Passwords and hashes are computed locally in your browser. We believe privacy is a right, not a feature.
Courseexe is built with Next.js, Go (Fiber), MongoDB, and deployed on a self-hosted VPS. The developer tunnel uses a custom TCP/TLS proxy. Everything is optimized for speed, low cost, and reliability — so we can keep it free for everyone.
15+ free tools and counting — all in one workspace