HIIT Interval Timer - Online Custom Work & Rest
Set up high‑intensity intervals with work, rest, and rounds. Audio cues. Sweat without any app. Local only.
UD5 Toolkit
Inhale · Hold · Exhale — visual guide for relaxation
Press Start to begin
This free online breathing timer works on any device — no app install needed. Simply choose a pattern, press Start, and follow the animated guide.
Set up high‑intensity intervals with work, rest, and rounds. Audio cues. Sweat without any app. Local only.
Countdown timer for applying a heating pad. Includes recommended max session. Prevent burns.
Set weekly reminders to soak your air plants. Timer and drying instructions included.
Plan your time‑lapse by entering desired clip length, fps, and event duration to find the shooting interval and total frames needed. Avoid under‑ or over‑shooting.
Set interval reminders to reapply sunscreen every 2 hours (or custom) with sound and notification. Protect kids' skin.
Calculate number of charcoal briquets for Dutch oven cooking temp. Also includes multi-stage cooking time.
Visualize real‑time linear acceleration (excluding gravity). Watch the 3D vector graph move as you shake the device.
Countdown timer with alerts for boiling pacifiers, bottles, or pump parts. Follow recommended times. Local audio alarm.
Enter skin type and UV index to estimate time to sunburn. Visual countdown reminder to reapply sunscreen or seek shade. Educational only.
Compute personalized daily water intake based on weight, climate, and exercise intensity. Converts to common cups/ounces. Purely local with no tracking.
See a live readout of window scrollX and scrollY. Visualize scroll direction. For debugging sticky navs.
Add plants and track when you last watered them. Get a simple visual alert when it's time to water. Local storage.
Set a financial goal and track progress with an animated thermometer. Enter current savings, target amount, and see percentage complete. Motivational & local.
Enter nozzle type and surface area to get optimal spray distance, sweep speed, and estimated cans needed. Prevent runs and drips.
Set a custom watering frequency reminder for succulents, with seasonal adjustment. Visual icon. Works offline after setup.
List cached responses for your domain. View headers, content, and delete individual entries. Understand your PWA's cache.
Enter number of people and desired duration to estimate the minimum square footage and ventilation CFM for a residential storm shelter.
Extract and view EXIF data from photos including camera settings, GPS location, and timestamps. All metadata read locally, your photos stay private.
Enter the recipe's wattage and your microwave's wattage to convert cooking time. Prevent burnt or cold food.
Compute compound interest with various compounding frequencies (daily, weekly, monthly). Compare APY with simple interest. Local and secure.
Calculate monthly EMIs for any loan type and see the detailed amortization schedule. Compare different interest rates and tenures with instant results.
Enter your weight and activity level to get a recommended daily water intake goal. Reminder to drink up.
Enter hop additions with time and alpha acid to estimate International Bitterness Units. Adjust recipe.
Calculate the series resistor and power dissipation for a zener diode voltage regulator. Input voltage, output voltage, load current. Local only.
Convert between currencies using manually updated or default rates. Great for estimation when offline. Local settings.
See how making extra payments reduces tenure and saves interest. Visual graph comparing original vs prepaid amortization. Purely local financial tool.
Calculate swim pace per 100m or 100yd based on total time and distance. Predict race times. For pool and open water swimmers.
Enter cabinet width and find optimal placement for knobs or pulls. Visual layout with grid. Achieve professional look.
Estimate how much CO2 a tree captures over its lifetime based on species, age, and climate. Learn about your green impact. Educational local tool.
Select your latitude and day of year to see sun path and identify spots with the most direct sunlight for solar garden lights. Simple visual tool.