Free Design Tools
Eight tools for the values a design runs on: convert a color between HEX, RGB and HSL, build a five-colour scheme from one of them, test a text and background pair against the WCAG thresholds, and generate the CSS for gradients, shadows and border radii. A px-to-rem converter and an aspect ratio calculator cover the arithmetic every layout needs. Each one hands you CSS to copy, not a picture of it.
Aspect Ratio Calculator
Give three numbers, get the fourth, and resize without squashing anything.
Open tool DesignCSS Border Radius Generator
Per-corner rounding, elliptical corners and blob shapes, with copyable CSS.
Open tool DesignCSS Box Shadow Generator
Stack up to four shadow layers and copy the CSS. Inset supported.
Open tool DesignColor Converter
Convert HEX, RGB and HSL, plus a built-in WCAG contrast check.
Open tool DesignColor Palette Generator
Turn one color into a five-color scheme and copy it straight into CSS.
Open tool DesignColor Contrast Checker
Test a text and background pair against the WCAG AA and AAA thresholds.
Open tool DesignCSS Gradient Generator
Linear, radial and conic gradients with a live preview and copyable CSS.
Open tool DesignCSS Unit Converter
px to rem, em, %, pt and viewport units, all at once and all configurable.
Open toolAll categories
Merge, split, rotate and reorder PDF pages without the file leaving your computer.
See these 6 toolsImages
Six tools for making an image lighter, smaller, a different format — or for reading what it hides.
See these 11 toolsText
Eleven tools for a block of text you need to change: case, order, duplicates, differences, counts.
See these 5 toolsSecurity
Five tools for passwords, hashes and 2FA codes, none of which send anything to a server.
See these 9 toolsCalculators
Nine calculators for arithmetic people get wrong on a phone: percentages, discounts, VAT, tips, loans.
See these 12 toolsDeveloper
Twelve tools for the formats that sit between systems: JSON, CSV, YAML, base64, JWT, UUIDs, timestamps.
See these 3 toolsEveryday
Three small tools that fit nowhere else: exact age, a fair random draw, Roman numerals.
See these 4 toolsTime
Four tools for counting time: days between dates, a week of shifts, a countdown, a focus timer.
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