Institutional-quality tools for students, teachers, and creators. 100% free, private, and fast.
Enter your current grade and instantly find your expected graduation year.
+Calculate weighted or simple grade averages across multiple modes.
+Randomly pick students from your class. No repeats until everyone's chosen.
+Visual countdown with presets, custom time, full-screen mode, and audio alert.
+Create and print customizable grading rubrics with criteria and point values.
+Analyze readability with Flesch-Kincaid, Gunning Fog, and Coleman-Liau.
+Randomly divide students into balanced groups by count or size. Shuffle anytime.
+Calculate your GPA from course grades and credit hours. Color-coded results.
+Create flashcards and study with flip-to-reveal. Shuffle and keyboard navigate.
+Interactive times table grid with a quiz mode. Track correct answers and streaks.
+Generate random seating charts. Customize rows and columns. Print-ready.
+Create formatted citations in MLA, APA, and Chicago for books and websites.
+Build a color-coded weekly timetable. Customizable periods and times. Printable.
+Track your essay writing progress toward a word goal with a visual ring.
+Create spelling tests that read words aloud. Students type what they hear.
+X% of Y, percent of, percentage change, and increase/decrease in one place.
+Generate printable arithmetic worksheets with an optional answer key.
+Roll virtual dice or pick a random number in any range. Great for class games.
+Add, subtract, multiply, and divide fractions with automatic simplification.
+Convert numbers to Roman numerals and back, from 1 to 3999.
+Generate customizable QR codes with custom colors and sizes. Download as PNG.
+Create strong, secure passwords with custom length and a strength meter.
+Generate beautiful palettes with multiple harmony modes. Copy HEX, RGB, or HSL.
+Generate placeholder text by paragraphs, sentences, or words. Optional HTML.
+Design linear, radial, and conic gradients visually. Copy CSS with one click.
+Create clean, printable invoices with line items, tax, and notes. Save as PDF.
+Write Markdown and see a live HTML preview side by side. Copy the rendered HTML.
+Generate random v4 UUIDs in bulk. Uppercase or dashless. Copy with one click.
+Convert HEX, RGB, and HSL and check WCAG contrast for accessible text.
+Convert length, weight, temperature, volume, speed, area, and data units.
+Calculate tips and split bills between friends. Supports custom tip percentages.
+Calculate days between dates or set up a live countdown to any event.
+Calculate and maintain aspect ratios for images, video, and screens.
+Calculate monthly payments, total interest, and a full amortization schedule.
+Calculate Body Mass Index with imperial or metric units. See your category.
+Stay focused with the Pomodoro technique. Customizable sprints and breaks.
+Convert between Unix timestamps and human-readable dates, local and UTC.
+Count words, characters, sentences, and paragraphs. Estimate reading time.
+Convert between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
+Format, validate, and minify JSON with syntax highlighting and error detection.
+Encode text to Base64 or decode it back. Swap input and output instantly.
+Test regular expressions in real time with live match highlighting and groups.
+Resize images in your browser. Lock aspect ratio, choose format, and download.
+Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
+Percent-encode text for URLs or decode it back. Component or full-URL mode.
+Compare two texts line by line and highlight what was added and removed.
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