Pack a folder of icons into one spritesheet with the CSS and the coordinates.
Build an SVG path from move, line, curve and arc commands and preview it live.
Click any swatch to copy its hex, with tints mixed toward white and shades toward black in sRGB.
Assemble a keyframe animation visually and copy the CSS, with duration, easing, fill mode and delay controls.
Protein, fat and carb grams for a target calorie level, with real food weights.
Click tokens to assemble a regular expression and see a live match against your text.
A grid calculator with a real formula engine: =A1+B2*2, =SUM(A1:B3), 16 functions, and real error cells for #DIV/0!, #CIRCULAR! and #NAME? instead of hanging.
Paste a list of numbers and see whether it fits an arithmetic, geometric, Fibonacci-like or polynomial rule, with the next term and an honest note on how much the fit is worth.
