Typing tests, flashcards, quizzes, OCR, and science calculators.
Typing Speed Test
Type the paragraph as accurately and quickly as you can.
How it works: A random paragraph is shown. As you type, letters turn green (correct) or red (incorrect). WPM = (correct characters/5) ÷ minutes elapsed. Accuracy = correct ÷ total typed. Example: Type 200 characters in 1 minute with 196 correct → 39 WPM at 98% accuracy.
WPM
0
Accuracy
100%
Time
0s
Flashcard Maker
Build a deck, flip to study — saved in this browser.
How it works: Add question/answer pairs to a deck, then flip through them with a 3D card flip animation. Cards are saved to localStorage so your deck persists. Shuffle to randomize order. Example: Q: "Capital of France?" / A: "Paris". Build a deck of 20 cards to study for a geography exam.
Your deck is empty — add a card above.
Card 1 of 1
Click the card to flip it
Quiz / MCQ Maker
Build a multiple-choice quiz, take it, see your score.
How it works: Create questions with 4 options each, marking the correct one. When taking the quiz, answers are highlighted green (correct) or red (wrong). Score is shown at the end. Example: Build a 5-question science quiz with multiple-choice answers, share it with classmates, and see who scores highest.
Your score
—
Handwriting to Text
Upload a photo of handwritten notes to extract text.
How it works: Uses Tesseract.js OCR engine running entirely in your browser. Upload an image of handwritten or printed text, and it extracts the text. Requires an internet connection on first use to download the ~12MB model. Example: Snap a photo of your lecture notes, upload it, and get the typed text to copy into your study document.
Extracted text
Best with clear, well-lit handwriting. Needs internet first time (downloads the model).
Molar Mass Calculator
Enter a chemical formula, get the molar mass.
How it works: Parses chemical formulas element-by-element, including parentheses for grouping (e.g., Ca(OH)₂). Multiplies each element's count by its atomic mass from a periodic table lookup. Example:C₆H₁₂O₆ (glucose) → C:6, H:12, O:6 = 180.156 g/mol. H₂O → 18.015 g/mol.
Molar mass
—
Physics Unit Converter
Convert force, energy, pressure, and power units.
How it works: Pick a category (force, energy, pressure, power), enter a value, choose source and target units. Uses exact conversion factors from standard reference tables. Example:10 kN → 10,000 N. 1 kWh → 3,600,000 J. 1 atm → 101.325 kPa.