Keep Privacy &
Developer Tools 100% Free
Courseexe provides free disposable inboxes, SMTP testers, email template builders, developer tunnel, cloud databases, and 15+ developer tools — entirely without ads, paywalls, or trackers. Supported purely by community contributions.
Infrastructure Budget Transparency
Real-time operational status & monthly hosting breakdown
What You Keep Evolving
Every donation goes directly to developing and running these free, open-source services for millions.
Thank You for Supporting Privacy!
Whether it's ₹50 or $100, your support keeps our open-source tools safe and functional for everyone. We appreciate you!
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Every contribution, big or small, directly funds free developer infrastructure
What You're Keeping Free
Every contribution goes into developing and running these free, open-source services
Disposable Mailbox
EmailInstant temporary email addresses with real-time SMTP delivery. Zero sign-up required — protect your real inbox from spam and one-time verifications.
SMTP Test Only
EmailConnect and validate custom SMTP server configurations online. Test your delivery flows, credentials, and encryption settings without a mail client.
Email Template Generator
EmailDrag-and-drop visual email builder with live HTML preview. Export responsive layouts ready for any marketing platform or transactional mailer.
Header Analyzer
EmailPaste raw email MIME headers for instant SPF, DKIM, and DMARC verification with full routing hop inspection and anomaly highlighting.
Email Validator & MX Check
EmailVerify syntax, resolve MX records, and check mailbox availability for any email address without sending a single message.
Secure Password Generator
SecurityGenerate cryptographically strong passwords with configurable length, symbols, and real-time entropy scoring in your browser — nothing leaves your device.
MD5 & SHA Hash Calculator
SecurityCalculate SHA-256 and MD5 cryptographic signatures for any string or text locally. Ideal for verifying integrity and password hashing.
JWT Token Decoder
SecurityInstantly decode and inspect JSON Web Token headers, payloads, and signatures without any network requests or third-party services.
URL Encoder / Decoder
DeveloperEncode or decode any string into safe URL components with percent encoding. Perfect for API query debugging and web development.
UUIDv4 Generator
DeveloperGenerate RFC-compliant universally unique identifiers entirely in your browser. Use for database primary keys, session tokens, and more.
ICMP Ping Latency
NetworkMeasure real network latency and server reachability with live ping results — useful for diagnosing connectivity and infrastructure monitoring.
DNS Lookup Console
NetworkResolve MX, SPF, DKIM, TXT, A, and CNAME records for any domain. Essential for email deliverability diagnostics and domain configuration.
SSL Certificate Validator
NetworkInspect TLS/SSL certificates for any domain — check expiry dates, issuer chains, and cipher suites to keep your infrastructure secure.
Cloud Database Clusters
InfrastructureSpin up instant, isolated MongoDB database clusters for your projects with dedicated credentials and a full connection URI — free for registered users.
Developer Tunnel (HTTPS)
InfrastructureExpose your localhost to the web via a secure courseexe.com subdomain with zero configuration. Ideal for webhook testing and app previews.
Secure Payment Options
Choose your region for the most optimal payment method
You can still use your domestic debit/credit card or PayPal to contribute.
Donate via PayPal / CardsThank You for Supporting Privacy!
Whether it's ₹50 or $100, your support keeps our open-source tools safe, fast, and functional for everyone. We appreciate you!
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