Developer Tools
Free, browser-based tools for backend engineers. No signup, no data sent to any server. Built from real production experience.
AI Crawler Checker
Check whether AI search crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended and more) are allowed to read your site. Reads your live robots.txt and reports each bot's access.
PostgreSQL EXPLAIN Visualizer
Paste your EXPLAIN ANALYZE output and get an interactive plan tree with automated performance warnings and optimization hints.
Kafka Partition Calculator
Calculate the optimal number of Kafka partitions based on throughput, consumer capacity, and broker count. Step-by-step math and tradeoff analysis.
Retry & Backoff Simulator
Visualize exponential backoff, jitter strategies, and the thundering herd problem. Compare retry strategies side by side with animated simulations.
Microservice Architecture Visualizer
Design interactive microservice architecture diagrams with drag-and-drop services, labeled communication patterns (REST, gRPC, Kafka), and shareable URLs.