Timestamp Microservice
Bidirectional time parsing service converting ISO 8601 strings and Unix epoch timestamps into standardized JSON objects with fallback handling.
Request Header Parser
Edge network metadata inspection service extracting client remote IP, upstream proxy hops, accept language headers, and user-agent software fingerprint.
Click above to query /api/whoami
URL Shortener Service
Short URL generation engine with asynchronous DNS hostname resolution verification (rejecting non-existent domains) and HTTP 302 redirection.
Exercise Tracker API
Relational workout management API featuring user entity creation, exercise session logging, and range-based date queries with limit pagination.
Click above to query /api/users
File Metadata Analyzer
Multipart form stream inspector parsing payload boundaries to extract original filename, canonical MIME type, and exact byte size.
Click above to analyze sample upload
Arithmetic Formatter
Strict vertical arithmetic layout engine with validation for operator whitelist, 4-digit width ceilings, and optional answer rendering.
Click to test vertical formatting
Time Duration Calculator
12-hour clock addition algorithm with automatic AM/PM conversion, multiple day rollover counters, and modulo day-of-week calculation.
Click to calculate duration
Budget App & Chart
Encapsulated Category class managing financial ledgers, inter-category transfers, and ASCII percentage spend distribution chart generation.
Click to render ASCII spend chart
Polygon Area Calculator
Geometric hierarchy with Rectangle and Square classes, computing perimeter, diagonals, ASCII picture representations, and shape tiling capacity.
Click to calculate polygon metrics
Probability Calculator
Stochastic Monte Carlo simulation engine performing randomized sampling without replacement to calculate empirical draw probabilities.
Click to run Monte Carlo trials