Every Cleanor Tool

Flip a virtual coin once or many times and count heads and tails. Free, in your browser, nothing is stored.

Test any text and background color pair against WCAG AA and AAA. Free, in your browser, nothing is uploaded.

Blend two colors together at any ratio and get the mixed HEX. Free, in your browser, no sign-up.

Generate complementary, analogous, triadic, and monochromatic palettes from one base color. Free, in your browser, nothing is uploaded.

Pick or sample any color and copy its HEX, RGB, and HSL values. Free, in your browser, nothing is uploaded.

Generate a range of shades and tints from a base color. Free, in your browser, no sign-up.

Combinations and permutations, exact. Free, instant, in your browser.

Turn a list with one item per line into a clean comma-separated list. Free, in your browser, no upload.

Compare two URLs side by side and highlight path, fragment, and query parameter differences locally.

See how savings grow with compound interest over time. Free, in your browser, no sign-up.

When did conception happen?. Free, instant, in your browser.

Concrete blocks (CMU) for a wall. Free, instant, in your browser.

Enter slab, footing, or column dimensions to get the concrete volume and how many bags of ready-mix you need.

Build a confidence interval for a mean from your sample stats. Free, in your browser, nothing is uploaded.

Estimate interest-only payments and total interest while a house is being built, and the mortgage payment once the construction loan converts. Free, in your browser, no sign-up.

Configure a cookie-consent banner and copy a self-contained HTML, CSS, and JavaScript snippet that remembers the choice. Free, in your browser, nothing is uploaded.

VO₂ max from a 12-minute run. Free, instant, in your browser.

Hearts, arrows, stars, check marks, degrees, currency and math signs, one tap to copy.

Set a number of minutes and count down to zero. Free, in your browser, no sign-up.

Days until any date, live to the second in your time zone.

Work out cost per 1,000 impressions from your spend and impressions. Free, in your browser, no sign-up.

Calculate the CRC32 checksum of a local file in the browser and compare it with a known value, alongside SHA-256, SHA-512, SHA-1, and MD5.

Cockcroft-Gault creatinine clearance. Free, instant, in your browser.

See how much interest a credit card balance costs this month and in total, and how long it takes to pay off. Free, in your browser, no sign-up.