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Image Contrast Adjuster
Expand or compress still-image channel distance from the tonal midpoint.
Image Cropper
Create exact social-media crops with an adjustable focal point.
Image Diagonal Symmetry Report
Measure RGBA mismatch across both diagonals of a centered square crop.
Images to PDF
Combine one to twenty supported images into a single PDF in selected file order.
JSON to INI
Serialize one bounded JSON object as deterministic global INI keys and one-level sections.
JSON to Properties
Serialize one flat JSON object as deterministic Java-style properties text.
JWT Expiry Checker
Explain JWT expiry and not-before timing against the current browser clock.
Kinetic Energy Calculator
Calculate kinetic energy with guided inputs, visible equations, substituted working, and model assumptions.
Link in Bio Page Planner
Turn approved profile, link-label, and destination inputs into an ordered link-in-bio plan.
Meta Title Generator
Create and measure reviewable page-title candidates from an explicit topic, modifier, brand, separator, and planning limit.
Mole Fraction Calculator
Calculate mole fraction with guided inputs, visible equations, substituted working, and model assumptions.
Passport Renewal Checklist
Create a bounded, browser-local passport renewal checklist with visible assumptions, review guidance, and downloadable output.