Astronomy
Compute the sun’s elevation and azimuth (NOAA algorithm) for any latitude, longitude, date and time, plus the length and direction of the shadow cast by an object of a given height, with sunrise/sunset and a full-day shadow curve
sun-position-shadow-simulatorHealth
Calculate cumulative sleep debt across the last 7 to 14 nights and generate a gradual recovery plan
sleep-debt-calculatorDevelopment
Preview Google SERP (pixel-accurate desktop & mobile truncation), X (Twitter) Card, and OpenGraph card side by side, with pre-launch SEO diagnostics
serp-social-preview-studioDevelopment
Parse EXPLAIN / EXPLAIN ANALYZE output (PostgreSQL/MySQL/SQLite) into a cost tree, flag estimated-vs-actual row divergence, and suggest indexes
sql-explain-plan-visualizerHealth
Convert swim benchmark times into 25m, 50m, and 100m pacing and generate CSS-style threshold intervals
swimming-pace-interval-builderMedia
Export one image into nine social-ready crops for Instagram, X, LinkedIn, YouTube, Facebook, Xiaohongshu, and TikTok
social-media-image-resizerMedia
Convert Sony SR2 RAW files to JPEG format. Automatically extracts image dimensions and metadata from the RAW file.
sr2-to-jpgMedia
Convert Sony SR2 RAW files to PNG format. Automatically extracts image dimensions and metadata from the RAW file.
sr2-to-pngMedia
Convert Sony SRF RAW files to JPEG format. Automatically extracts image dimensions and metadata from the RAW file.
srf-to-jpgMedia
Convert Sony SRF RAW files to PNG format. Automatically extracts image dimensions and metadata from the RAW file.
srf-to-pngMedia
Convert Panasonic RW2 RAW files to JPEG format. Automatically extracts image dimensions and metadata from the RAW file.
rw2-to-jpgMedia
Convert Panasonic RW2 RAW files to PNG format. Automatically extracts image dimensions and metadata from the RAW file.
rw2-to-png