Number Memory Trainer - Online Recall Digits
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
UD5 Toolkit
Master the Braille alphabet with instant feedback, quizzes, and a handy reference chart.
Tap/Click the dots to form a letter (Explore mode)
Select the correct letter:
A sequence of digits flashes for a few seconds. Type it back. Increase length. Improve your working memory.
Write a short note and set a specific time for a browser notification reminder. Great for quick one‑offs. Local.
Set recurring audio/visual reminders to check and correct sitting posture. Adjustable interval and notification style. Helps reduce back pain from desk work.
Enter hiding places and get a set of rhyming clues to print. Fun for kids' parties.
Create a properly styled 'Skip to Content' link. Customize target and appearance. Essential for keyboard users. Copy the HTML/CSS.
Timer that reminds you to look at something 20 feet away for 20 seconds every 20 minutes. Customizable intervals and subtle sound/visual alerts.
Quick reference for what to do (and not do) after a snake bite. Pressure immobilization bandage diagram.
Perform gestures on a canvas and see them detected in real time. Logs swipe direction, pinch scale, and rotate angle.
Simulate an earthquake alarm with a countdown and visual instructions for Drop, Cover, and Hold On.
Transform English text into pseudolocalized text with accents, expansion, and brackets. Test your UI's readiness for translation.
Convert normal text into UwU‑ified cuteness with 'w', nyaa, and blushes. Original meme generator.
Set a timer that reminds you to take a break, stretch, or follow the 20‑20‑20 rule. Desktop notification supported. Runs offline.
Explore all Intl APIs: NumberFormat, DateTimeFormat, RelativeTimeFormat, ListFormat. See outputs for any locale. Powerful i18n.
Enter word pattern with ? for unknown letters and known letters to find matching dictionary words. Essential crossword help. Local dictionary.
Compare the real cost of currency exchange including hidden mark-ups and service fees. See how much you lose per transaction. Local educational tool.
Timer to remind you to limit shower water exposure even with a cast cover. Keep your cast dry.
Calculate the correct series resistor for an LED based on supply voltage, LED forward voltage, and desired current. Circuit diagram shown. Local only.
Convert any text to snake_case, kebab‑case, camelCase, or PascalCase. Essential for programming variable naming. Local.
Type a modern English word and get a possible Old English equivalent. Works offline with a limited but curated wordlist. Learn history.
Set a meditation duration with optional interval chimes. Soothing bell sounds at the start and end. No ads.
Enter your must volume and current Brix, TA, and pH to calculate additions of sugar, acid blend, or tannin. Standard winemaking formulas.
Set a reminder to change smoke detector batteries every 6 months. Optional sound alert and visual countdown. Local browser notification, stay safe.
Paste the reference language JSON and a target language JSON. See which keys are missing or extra. Translate with confidence.
Log your daily water consumption with one click. Set a goal and track progress. Data stored locally for privacy. Simple and clean interface.
Need a reason why you are late or the build failed? Get a hilarious, tech‑themed excuse. Pure fun for dev teams.
Load a video and visually check if audio aligns with lips. Use frame‑by‑frame stepping. Debug playback issues.
Compare time across multiple time zones and find a suitable meeting time. Convert a specific time to various cities. Browser-based and always accurate.
Enter total bill, tip %, tax amount, and number of people. Instantly see what each person owes. Handles uneven splits too. No data saved.
Calculate the real monetary cost of a meeting by attendees' hourly rates. A humorous yet insightful productivity tool. All local calculation.
Remove silent parts from an audio recording. Useful for podcasts and lectures. Set threshold and minimum silence duration.