Articles
Practical guides for SmartPlusLab online tools.
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How to Generate CSS Grid Layout Code with Columns, Rows, and Gaps
Enter columns, rows, and optional gap values, then generate the CSS. Numeric track counts become repeat declarations, custom track text is retained, and emitted gap values use pixels.
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How to Generate a CSS Gradient
Enter the gradient type, direction, and comma-separated colors, then generate and review the CSS. Use `linear` for the linear branch; other type text values produce a circular radial-style result.
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How to Format CSS with a CSS Formatter
Enter CSS as a string, choose an indentation value and either beautify or minify mode, then run the formatter. Use the returned text as formatted output, not as proof that the stylesheet is valid or standards-compliant.
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How to Generate CSS Flexbox Layout Code
Set the Flexbox options you need and generate the CSS snippet, then inspect its declarations. Unspecified options use the reviewed defaults for direction, justification, alignment, wrapping, and gap.
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How to Search and Use the CSS Color Names Reference
Enter a color name or hexadecimal value to search the built-in named-color collection. A valid six-character hexadecimal query with no direct match can also return a nearest named color.
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How to Create CSS Clip-Path Shapes
Choose a named shape, optionally enter its size and position, and generate the CSS snippet containing a `clip-path` declaration. Empty shape, size, and position inputs use `circle`, `50`, and `center`, respectively.
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How to Generate a CSS Box Shadow
Enter the shadow settings, choose whether the shadow is inset, and generate the CSS declaration. The result includes your offsets, blur, spread, and color, with `inset` added when enabled.
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How to Generate a CSS Keyframe Animation
Set the animation name, duration, easing, direction, and fill mode, then generate the CSS text. The result includes a keyframe animation plus an element animation declaration.
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How to Generate Fake Credit Card Numbers for Testing
Choose a supported type, set a count when needed, and enable additional details for supporting fields. The tool returns fake card numbers for testing with a calculated check digit and optional expiration, security-code, and grouped-number data.
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How to Calculate a Countdown to a Future Date and Time
Enter a future date and time in `YYYY-MM-DD HH:MM` format, then submit it to get a snapshot showing the remaining time in seconds, days, hours, minutes, and seconds. A target at or before the calculation time returns a past-target error indication instead of countdown values.
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How to use a compound interest calculator
Enter the principal, rate, duration, compounding choice, and optional positive contribution to calculate compound-interest growth. Empty inputs use the calculator’s defaults, and calculated amounts are rounded to two decimal places.
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How to Generate Lighter and Darker Color Variants
Enter a hexadecimal color, choose a positive step count, select the lighter and darker groups you want, and run the generator. The result provides the selected color variants, with each included group containing the chosen number of entries.