Christmas Countdown - Online Days Until Santa Claus
A festive countdown showing days, hours, minutes until December 25. Animated snow and music toggle. Local time.
UD5 Toolkit
Start building your reading list by adding your first book!
A festive countdown showing days, hours, minutes until December 25. Animated snow and music toggle. Local time.
Click any element to see its Bohr model with electrons orbiting in shells. Beautiful, educational diagram.
Convert between ounces and millimeters for leather. Visual guide to common project thicknesses.
Split a large CSV into smaller files by row count. Preview each chunk. No upload; streamed locally.
Zoom through sizes from the Planck length to the observable universe. Educational and awe‑inspiring visualization.
Convert Markdown text into clean HTML code. GitHub Flavored Markdown supported. Copy the raw HTML or preview the rendered output instantly. No uploads.
Easily convert JSON data arrays into CSV format for Excel or database import. Handles nested structures with flattening options. All conversions happen locally, no data uploaded.
Paste a public SSH key to generate its fingerprint. Verify host keys. Local Web Crypto.
Fold a virtual square paper step by step with crease lines and visual previews. Practice origami basics without wasting real paper. All canvas‑based.
Log leftovers with date stored and set visual alerts when they need to be eaten. Reduce food waste. Local storage.
Calculate how many books, DVDs, or vinyl records fit on a shelf given its length and depth. Useful for home library planning. Local only.
Keep track of stitches and rows for your knitting projects. Multiple counters with increase/decrease shortcuts. Data saved in your browser.
Create categorized shopping lists (produce, dairy, meat, etc.). Add items, check them off, and print. Data stored in your browser. Never lose a list.
Log period start dates and cycle length locally. Predict next period and fertile window. Data stays in your browser's storage, never uploaded. Private by design.
Log daily sleep to see cumulative sleep debt or surplus over weeks. Visualizes chronic sleep loss trends. Stores data locally in your browser only.
Shows a counter of how many seconds you have been idle. Tracks mouse and keyboard activity without recording.
Search by country or city to find the capital. Full offline list. Useful for homework or travel planning. Static data.
Convert a JSON array of strings or numbers into a single‑column CSV. Quick data dump. Local.
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Take a list of items and reverse the line order. The first becomes last. Simple and quick.
Break a large block of text into a numbered list of sentences. Useful for analysis or translation. Local processing.
Keep a simple list of movies you want to watch. Add notes and check them off. Purely local storage.
Tap a glass icon each time you drink a cup of water. See your daily intake. Reminders optional. Local storage.
Paste your CSS and get a sorted list of all custom properties defined under :root with their values. Quick audit.
Pick a color for each day's mood and see a month‑at‑a‑glance heatmap. Data stored locally. A private emotional log.
Paste a list of URLs or texts and generate QR codes all at once. Download as individual images or a single sheet.
Enter terms and definitions and generate a clean `<dl>` HTML snippet. Great for glossaries and FAQs.
Paste lines of text and automatically convert to an HTML ordered list with correct numbering and indentation.
Reorder a list of items by dragging them. Paste a list, sort it by hand, and copy the new order. Simple.
Log neck, chest, waist, hip, and limb measurements over time. See changes on a chart. All data stored locally.