Outils en ligne gratuits

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

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.

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

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.

Convert HEX color codes to HSL and HSLA values with hue, saturation, lightness, and a live preview.

Convert RGB screen colors to CMYK print values with cyan, magenta, yellow, and key (black) percentages.

Build linear and radial CSS gradients with multiple color stops, live preview, and copy-ready code.

Design CSS clip-path shapes with live preview and copy-ready CSS, inline styles, and Tailwind classes.

Generate RFC 4122 UUID v4 identifiers in bulk with optional uppercase and hyphen formatting.