Holiday Countdown Tracker β Online Days Until Halloween, Christmas, etc.
Shows live countdown to major holidays and allows custom ones. Visual calendar. Local browser storage.
UD5 Toolkit
Shows live countdown to major holidays and allows custom ones. Visual calendar. Local browser storage.
Wait for the box to turn green, then tap as fast as possible. Measure milliseconds. Compete with friends.
Enter any date and instantly know which quarter it belongs to. Also shows fiscal quarter if start month set.
Convert any date into Roman numerals (dayβmonthβyear) for tattoos or special occasions. Clean and local.
Convert any date into Roman numerals (dayβmonthβyear) for tattoos or special occasions. Clean and local.
Convert numbers to Roman numerals and decode Roman numerals back to numbers. Supports up to large values. A fun educational tool running entirely in your browser.
Adjust cocktail ingredient quantities based on desired total volume or number of servings. Preserve classic ratios. Perfect for home bartenders.
Define min and max font sizes and viewport widths. Generate a complete fluid type scale using CSS clamp() for all headings.
Convert any integer up to 3999 into its Roman numeral representation and vice versa. Quick and accurate. Local.
Fairly distribute pooled tips among staff based on hours worked or points. Customizable percentages. All calculations local and private.
Enter min and max font sizes and viewport widths to generate a perfect CSS clamp() expression. Fluid typography without media queries.
Find out what day number of the year any date is (1β366). Also shows days remaining. Simple reference.
Convert a Gregorian calendar date to its Julian Day Number and vice versa. Used in astronomy and mainframe computing.
Paste any JavaScript snippet and get a readyβtoβdrag bookmarklet link. Minify and encode automatically. Pure client.
Calculate how many books, DVDs, or vinyl records fit on a shelf given its length and depth. Useful for home library planning. Local only.
Look at HTTP headers and JavaScript objects to guess which browser extensions might be installed. For awareness.
Calculate tips and split bills easily. Adjust tip percentage and number of people. Perfect for dining out. All computations happen on your device.
Generate a horizontal Codeβ128 barcode from any string. Download as PNG or SVG. Works offline. For inventory.
Paste two JSON objects and see a highlighted diff showing what was added, removed, or changed. For API testing.
Enter starting room temp, target temp, and method to see how many minutes to chill your wine perfectly.
Write expressions with clamp(), min(), max(), abs(), sign(), round() and see the computed value. Modern CSS calculations.
Find equivalent colors across DMC, Anchor, and Madeira embroidery floss brands. Enter a code to see matches. Local reference database.
Convert decimal negative and positive numbers to 8/16/32-bit two's complement binary. Essential for low-level programming.
Paste a URL or HTML to detect known vulnerable JavaScript library versions. Quick security audit. Clientβside only.
Paste long text and split it into 2, 3, or 4 balanced CSS columns. Preview and copy HTML/CSS. For magazine layouts.
Encode decimal integers into signed magnitude binary representation and decode back. Learn computer arithmetic.
Animated circle guides your breathing: breathe in, hold, breathe out. Customizable ratios (e.g., 4-7-8). Soothing colors, optional bell sound. Purely local.
See famous people's life spans on a draggable timeline. Compare who was alive at the same time. Educational fun.
Fullβscreen random colour changes at a slow pace. Use it as a dynamic background for meditation or focus.
A small widget that records your clipboard text history (only while open). Search and reβcopy old snippets. No log upload.