SelfDevKit Blog

Learn how I use SelfDevKit to build native iOS applications like FeelClose, a long-distance couples app. From debugging Supabase APIs to decoding JWTs, see the developer tools that power mobile development.

Learn how I use SelfDevKit to build production services like Is It Visible, a mountain visibility forecasting platform. From JSON debugging to URL encoding, see the developer tools that power real projects.

Master regex with this comprehensive regex tester guide. Learn regex syntax, common patterns for validation, capture groups, and how to test expressions effectively with real-world examples.

Learn how hash generators work and when to use MD5, SHA256, SHA512, or BLAKE. Understand hashing for file integrity, password security, and API authentication with practical examples.

Learn how to base64 encode and decode text and images. Understand data URIs, when to use Base64, and how to convert images to Base64 strings for HTML, CSS, and APIs.

Learn how to generate truly secure passwords in 2025. Understand password entropy, strength analysis, and why offline generators are the only safe choice for your credentials.

Learn how to decode, validate, and debug JWT tokens securely. Understand JWT structure, algorithms, claims, and why offline decoders protect your authentication secrets.

Learn how to format, view, validate, and debug JSON data efficiently. Discover the best JSON tools for developers and why offline formatters protect your sensitive API data.

Discover why privacy-focused, offline developer tools are essential in 2025. Learn how local processing protects your API keys, JWT tokens, and sensitive data while delivering instant performance.

Master SelfDevKit from installation to advanced workflows. Learn how to use JSON tools, JWT decoder, ID generators, and 50+ developer utilities to boost your productivity while keeping your data completely private.