Beaufort Wind Scale Visualizer β Online Speed & Sea State
Drag a slider to see wind speed in knots/mph/kmh and the corresponding sea conditions and land effects.
UD5 Toolkit
Drag a slider to see wind speed in knots/mph/kmh and the corresponding sea conditions and land effects.
Enter a keyword or author to find classic quotes from public domain works. Inspiration tool.
Learn to identify the 10 basic cloud types from photos. Selfβtest quiz mode. Useful for pilots and hikers.
Interactive list of stinging insects ranked by pain level with descriptions. Fascinating entomology.
Hear a word spoken by browser TTS and type the spelling. Choose difficulty or paste your own list. Great for kids. Local only.
Play random Morse characters at configurable speed. Learn with Koch or Farnsworth method.
Enter height and get fall time and impact speed. Simple physics demo. Good for students.
Identify countries from their flags. Multiple difficulty levels and regions. Track your high score. Educational geography game. Works offline.
Drag pie slices to represent fractions and see them added together. Great for visual learners.
Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.
Interactive table showing common fractions and their decimal/percentage equivalents. Click to highlight.
Compare standard keyboard layouts side-by-side. Click keys to see characters. Useful for learning alternative layouts.
Type a passage and see it appear in a realistic cursive font. Helps connect handwriting to digital text.
Calculate absolute error, relative error, and percent error between experimental and theoretical values. For science students. Instant local math.
Complete a 10x10 multiplication grid against the clock. A fun way to master times tables.
Morse characters flash on screen; you must tap them correctly on a single button. Points for accuracy and speed. Learn Morse in a fun way.
Identify common invertebrate fossils (ammonite, trilobite, brachiopod) from sketches. Amateur paleontology.
Paste a list of references and sort them AβZ by first author. Handles various formats.
Fetches a random Wikipedia article summary via API. Read interesting facts. Simple knowledge discovery tool. No data collected.
Click cells to see patterns, highlight multiples. Visual way to learn multiplication. Print empty grid.
Answer yes/no questions about color, hardness, streak, luster to narrow down common rocks and minerals.
A kanji appears; you guess how many strokes it has. Learn stroke order awareness.
Show a word and guess the correct translation, but watch out for false friends. Avoid embarrassment.
Paste words with translations, shuffle, test yourself. Simple local spaced recognition.
Virtual rooms where you can place images representing items to remember. Practice the method of loci.
See a clip of a famous artwork and choose the correct title. Art history fun. Local images.
Create custom number lines (0-20, negative, fractions, decimals) for math education. Adjustable ticks and labels. Instant download.
Paste word pairs (or load pre-made sets) and practice with randomized flashcards. Flip to reveal translation, mark as known/unknown. Local data, no login.
Paste a line of poem and see which syllable stresses create a particular meter. Educational tool.
List assignments with estimated minutes. See total time and break into Pomodoro sessions. Stay motivated.
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.
Enter up to 20 words and a title to generate a printable word search grid. Custom size.
Practice mental arithmetic with customizable operators and digit count. Timed rounds, score tracking. Works offline. Improve your brain speed.
Generate printable math worksheets for addition, subtraction, multiplication, and division. Choose difficulty and number of problems. Answer key included.
Randomly given base form, type past simple and past participle. Score tracking.
Enter length or period to find the other. Visual swinging animation. Quick physics reference.
Type any text and generate a printable cursive handwriting practice sheet with dotted lines. Choose font styles. Local generation.
Enter spring constant and displacement to find force and stored energy. Visual compression.
Type a simple sentence and get guided prompts to add who, what, where, when, why. Build richer sentences.
Drag a virtual mineral across common items to understand scratch hardness. Interactive learning for jewelers.
Paste text and set display speed for Rapid Serial Visual Presentation. Train your reading speed.
Generate customizable alphabet tracing sheets with uppercase and lowercase letters. Select letters to focus on. Instant print. Local only.
Virtual flip coins thousands of times and see the heads/tails ratio converge to 50%. Interactive law of large numbers.
Select common materials (wood, plastic, metals) and see density chart. Predict floating. Fun science.
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
Type a modern English word and get a possible Old English equivalent. Works offline with a limited but curated wordlist. Learn history.
Enter student names and desks layout, then scramble periodically. Print new seating chart.
Shows a random historical event that occurred on today's date. Fun daily knowledge snippet.
Convert between scientific notation (a Γ 10^n) and decimal form. Also supports engineering notation. Instant, local.
Calculate the time needed to deposit a certain mass of metal using current. Chemistry lab tool.
Random shapes appear; compute the area mentally. Multiple choice. For middle schoolers.
Determine what score you need on your final exam to achieve your target overall grade. Enter current grade, weight, desired grade. Local only.
Quiz yourself on element symbols, names, and atomic numbers. Multiple modes: element to symbol, symbol to element. Score tracking. Great for chemistry students.
See a literal illustration of an idiom and guess the phrase. Fun for English learners.
Select leaf characteristics (simple/compound, smooth/toothed) to identify common North American trees.
Type a simple sentence and see a rudimentary ReedβKellogg diagram. Educational.
Drag words to the correct position in a sentence using in, on, at. Visual feedback.
Classic hangman with linguistic terms (adjective, participle, etc.). Solidify your grammar vocabulary.
Drag a battery, resistor, LED onto a grid and simulate current flow. Show Ohm's law in action.
Select a simple 3D shape (cube, pyramid, cylinder) and generate a printable flat net with fold tabs. Great for DIY crafts and math class.