US paycheck calculator - take-home pay per paycheck after federal, FICA, state, 401(k) and health deductions

US federal income tax calculator - brackets, deductions, child tax credit, marginal and effective rate, room to next bracket

US federal tax brackets and thresholds - standard deduction, wage base, NIIT, capital gains bands (2025/2026)

Used-car buyer report from a VIN - recalls, complaints by component, crash ratings, flags and inspection checklist

US quarterly estimated tax calculator for freelancers - SE tax, safe harbor and four dated payments

Image metadata reader - camera, exposure, dimensions, GPS with map links and privacy risk (JPEG, PNG, WebP)

Location hazard report - flood zone, seismic hazard, disaster history, alerts, Superfund and radon with an overall level

Semver range check - does a version satisfy ^, ~, x-range or || ranges

Semver comparison - which version is newer and the kind of difference

Social preview and SEO meta checker - Open Graph, Twitter Card, image check, per-platform previews and a graded checklist

Semver resolver - best satisfying version, latest stable and safe upgrade advice from a version list

Dockerfile linter - 25+ rules with fixes, A-F grade and multi-stage advice

Number to words - cardinal, ordinal, Roman numerals, Indian grouping and cheque wording

HTTP status troubleshooter - meaning, causes, fixes, headers and related codes for one code, a list or a search

Coastal water brief - live buoys, tides, marine alerts, 3-day seas scored for boating, kayaking, surfing, swimming

Last spring / first fall freeze dates with percentile risk and planting risk table from NASA POWER history

COVID, flu and RSV by state - CDC ARI level, ED visits, wastewater levels and trend, national rank, guidance

Semver list sorter - ascending or descending with invalid entries reported

Outdoor trip brief - activity-scored forecast, best window, river gauges and flood stage, wildfires, sun/moon, pack list

Monthly temperature, rain, humidity, dew point, wind and sun normals with climate summary