6 free tools
Graphic Design tools built for real work
Practical calculators and converters for visual design systems, responsive typography, sizing and accessibility checks. Every tool is designed to expose its inputs and outputs clearly instead of hiding the logic behind a vague score.
◆Aspect Ratio CalculatorCalculate image, video and screen aspect ratios, simplify dimensions, and resize while preserving proportions.→◆Design Token ConverterConvert nested JSON design tokens to CSS custom properties and convert CSS variables back to flat JSON locally in your browser.→◆PX ↔ REM/EM ConverterConvert CSS pixels, rem and em units using an editable root and parent font size for responsive web design.→◆Responsive Typography Scale CalculatorGenerate fluid CSS clamp() typography values from minimum and maximum viewport widths, font sizes and a modular scale.→◆Touch Target Size CheckerCheck button and link dimensions against WCAG 2.2 target-size minimum guidance and a simplified spacing test.→◆WCAG Contrast CheckerCalculate WCAG text contrast ratio from two colors and check AA/AAA thresholds for normal and large text.→
Why ToolboxKart Graphic Design tools?
Fast interfaces, plain-language explanations, mobile-friendly layouts and no unnecessary account wall for the utilities in this release.
Tool first
The working interface appears before long-form SEO content, so you can finish the task quickly.
Transparent logic
Calculators disclose formulas or assumptions where they matter, and analyzers avoid pretending subjective checks are scientific facts.
Reusable results
Copyable output and clean formatting are included where they improve the workflow.