免費線上工具

Generate a full Tailwind CSS shade scale (50–950) from a base color with copy-ready v3 config and v4 @theme exports.

Generate CSS triangles with the border trick or clip-path. Customize size, direction, and color with live preview.

Encode UTF-8 text to Base64 instantly in your browser with byte-size stats.

Compare two texts and highlight added, removed, and changed lines or words instantly in your browser.

Get the reverse complement of a DNA or RNA sequence — A↔T/U, G↔C with GC content and FASTA support. Free, instant, browser-based.

Generate Punnett squares for monohybrid and dihybrid crosses with custom trait names, parent labels, and genotype or phenotype ratios. Free, instant, browser-based.

Compute mean, median, mode, standard deviation, variance, quartiles, range, and more from any dataset with step-by-step formulas.

Calculate star distance from parallax or magnitude. Convert between parsecs, light-years, AU, and km. Free, instant, browser-based astronomy tool.

Calculate gear ratio, output RPM, and torque multiplier for spur gear trains. Single-stage, compound 2-stage, RPM solver, and tooth-count finder for target ratios. Enter driver and driven tooth counts — get speed reduction and ideal torque gain. Free, browser-based.

Calculate percent error, absolute error, relative error, and percent difference between measured and accepted values. Step-by-step formulas for physics and chemistry lab reports. Free, instant, browser-based.

Split a PDF into separate files by page, fixed chunks, or custom ranges — entirely in your browser.

Generate relevant social media hashtags for Instagram, TikTok, LinkedIn, and more using your own AI API key.