Practical tutorials & tools for modern developers.
A curated set of everyday dev utilities — format SQL, convert dates, switch timezones, and test APIs. No sign-up. No servers. Nothing stored.
Paste raw SQL and get beautifully formatted, readable queries in one click.
Parse any date string and convert it into any of 40+ formats instantly.
Convert any datetime between timezones and see a live world clock instantly.
Test REST API endpoints with params, auth, custom headers, and a request body.
A complete, hands-on Kubernetes course — from architecture to production operations, with runnable YAML on every page.
A practical Docker course covering images, containers, networking, volumes, Compose, and registries — from first run to production.
A comprehensive Spring Boot course covering REST APIs, DI, JPA, Security, Testing, and Actuator — from first endpoint to production-ready app.
Build LLM-powered applications with LangChain — covering models, prompts, chains, memory, agents, and RAG pipelines from first call to production.
Build stateful, multi-agent AI workflows with LangGraph — covering state management, cycles, checkpointing, human-in-the-loop, and streaming.
Master Retrieval-Augmented Generation — from document loaders and embeddings to advanced retrieval strategies and production-ready pipelines.
Master Machine Learning from first principles — regression, classification, neural networks, PyTorch, feature engineering, and model evaluation.
Master event streaming with Apache Kafka — from core architecture to Kafka Streams, Kafka Connect, and Schema Registry with real production patterns.
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