On-Demand Developer Mailbox & Server Ecosystem
Verify custom emails & virtual SMS OTPs instantly, generate interactive database ERD diagrams, run side-by-side SMTP connection diagnostics, host MySQL & MongoDB clusters, and expose local tunnels.
Give Extra Storage Space to All Your Employees for Free
Company owners can apply once with their corporate domain (info@ or admin@). Approved companies get up to 2 GB storage per employee automatically.
Integrated Developer Workspace & Server Tools
No third-party accounts or external API keys needed. Everything you need to test email flows, receive OTPs, visualize database schemas, and expose ports in one unified hub.
Disposable Communications & Messaging
Disposable Mailbox
Generate temporary email aliases instantly. Inbound wildcards route automatically via local MX records and stream messages in real-time.
Disposable Virtual SMS Numbers
Select active temporary phone numbers to receive SMS verification codes & OTPs live on your browser without signing up.
YourMail Developer Client
Permanent developer email account with custom SMTP credentials, app-passwords, storage management, and full-featured inbox.
Cloud Databases & ERD Schema Visualization
MySQL Cloud Databases
Provision isolated MySQL databases on demand. Configure remote IP access whitelists, execute raw SQL queries, and manage schemas.
MongoDB Document Clusters
Spin up managed MongoDB document stores instantly. Query collections online, insert sample JSON documents, and extract connection URI strings.
Visual Database ERD Generator
Auto-generate interactive Entity-Relationship Diagrams from your live databases with table nodes, primary/foreign key connections, and visual zoom/pan canvas.
Email Server & Network Diagnostics
SMTP Diagnostics & Delivery
Test custom SMTP server configurations side-by-side. Validate TLS handshakes, authentications, and send test emails with raw logs.
Developer Local Tunnels
Forward local ports (e.g. webhooks or local servers) to public URLs using standalone developer CLI tunnel binaries.
Network Diagnostic Console
Run real-time Ping latency tests, DNS console checks (MX, SPF, DKIM, TXT), email header routing hop analyzers, and SSL certificate validators.
Developer Workspace Utility Suite
Email Template Generator
Build responsive HTML transactional email layouts (OTPs, Welcome, Password Resets) with custom color themes and live previews.
Security & Token Utilities
Instant password strength generator, UUIDv4 random generator, MD5/SHA hash calculator, URL encoder/decoder, and JWT token payload decoder.
Text & Content Utilities
Real-time word & character counter, uppercase/lowercase converter, duplicate lines remover & sorter, and Lorem Ipsum paragraph generator.
How Courseexe Orchestrates Developer Tools
Courseexe functions as a high-performance Go Fiber backend connected to MongoDB, Redis, and native database instances, providing zero-friction staging tools directly in your browser.
Catch-All SMTP & SMS Receiver
Inbound emails and SMS messages hit our Go servers directly and stream to your browser over WebSockets.
On-the-Fly Database Provisioning
Instantly spin up isolated MySQL databases & MongoDB collections with automated connection strings and interactive ERD diagrams.
Reverse Proxy Local Tunnels
Stream traffic from local developer ports directly to public endpoints without complicated NAT configuration.
Local Catch-All Flow Diagram
🎯 Our Mission
Courseexe is a privacy-first developer ecosystem built for engineers. We believe tools should be fast, clean, and free of trackers or paywalls.
Learn About Us →💬 Get in Touch
Have questions, feature requests, or custom infrastructure inquiries? Reach out to our engineering team directly via email.
Contact Support →❤️ Support the Platform
Courseexe is community-funded. 100% of contributions go directly to server hosting, bandwidth, SSL renewals, and databases.
Donate to Courseexe →Ready to Accelerate Your Development Workflow?
Access temporary emails, receive SMS OTPs, generate visual ERD schemas, host databases, and test SMTP connections instantly.