Temperature Converter - Online Celsius Fahrenheit Kelvin Tool
Convert temperature between Celsius, Fahrenheit, and Kelvin instantly. Simple slider and input fields. Useful for travel and science homework.
UD5 Toolkit
Convert temperature between Celsius, Fahrenheit, and Kelvin instantly. Simple slider and input fields. Useful for travel and science homework.
Search a library of famous company brand colors with hex codes. Copy any color instantly. For designers and marketers.
A giant buzzer screen. Two or more players can press their spacebar or touch their side. Lights up the fastest.
Log how many cycles since last refill and get an alert when it's likely empty.
Log which family member takes which medicine and when. Reminders for next dose. Data stays local.
Build a categorized list of possessions with value, serial number, and photo (local). Export for insurance purposes. Private.
Simple tracker to record potty attempts, successes, accidents. See patterns. Data stays local. Aids in toilet training journey.
Track attendance for multiple subjects. Mark present/absent and see percentage. Data in localStorage. Simple student tool.
Plot weekly weight gain against recommended ranges based on pre-pregnancy BMI. IOM guidelines displayed. Data stored in localStorage.
Keep track of stitches and rows for your knitting projects. Multiple counters with increase/decrease shortcuts. Data saved in your browser.
Set a financial goal and track progress with an animated thermometer. Enter current savings, target amount, and see percentage complete. Motivational & local.
Track up to 5 habits with a visual chain. Tap to mark day as done, see longest streaks. Data saved in your browser. Inspired by 'Don't break the chain' method.
Track days of sobriety with a motivational counter and milestone celebrations. Set quit date and see time elapsed in days, hours, minutes. Private & local.
Track daily mood with emoji selection and optional notes. See weekly/monthly mood trends in a color-coded chart. All data stored privately in localStorage.
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.
Visualize how caffeine decays in your body over time. Enter intake amount and see remaining caffeine at bedtime to optimize sleep. Uses standard 5-hour half-life.
Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
Record daily systolic/diastolic readings and pulse. See a trend chart. All data saved locally in your browser.
Shows a counter of how many seconds you have been idle. Tracks mouse and keyboard activity without recording.
Snap or type expense details and store them locally. Categorize and see monthly totals. No cloud, no sign‑up.
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Keep a simple list of movies you want to watch. Add notes and check them off. Purely local storage.
Add book titles and authors to a to‑read list. Move them to 'finished' and add a rating. Data saved locally.
Tap a glass icon each time you drink a cup of water. See your daily intake. Reminders optional. Local storage.
Pick a color for each day's mood and see a month‑at‑a‑glance heatmap. Data stored locally. A private emotional log.
Log neck, chest, waist, hip, and limb measurements over time. See changes on a chart. All data stored locally.
See the International Space Station’s current position on a world map in real time. Uses public API. No refresh.
Track your subscriptions, calculate monthly and yearly totals, and find savings by pausing unused services. Local data.
Add plants and track when you last watered them. Get a simple visual alert when it's time to water. Local storage.