Visual Fraction Adder – Online Slice & Combine Pies
Drag pie slices to represent fractions and see them added together. Great for visual learners.
UD5 Toolkit
Visualize an estimated network hop path from your device to any destination
Simulation for learning & demonstration purposes only
traceroute (or tracert on Windows) command in a terminal.Drag pie slices to represent fractions and see them added together. Great for visual learners.
Load images or use colors and apply all 15 CSS blend modes. Visual tester for creative effects.
Overlay outlines of different paper sizes scaled to real dimensions on screen. Choose the right one.
Build a cron expression using plain English toggles and see its visual timeline. No memorization needed.
Build a combination resistor network by adding series/parallel groups and get total resistance. Visual circuit.
Virtual rooms where you can place images representing items to remember. Practice the method of loci.
Animated circle guides your breathing: breathe in, hold, breathe out. Customizable ratios (e.g., 4-7-8). Soothing colors, optional bell sound. Purely local.
Enter a decimal number and see a visual breakdown of bits, place values, and bitwise operations. Learn binary easily.
Add multiple CSS filters (grayscale, blur, hue‑rotate) to an image. See the combined effect. Copy the CSS filter value.
Send HEAD requests to popular websites and measure the round‑trip time. Quick network health check. Client‑side.
See how grid-auto-flow: row vs column changes item placement. Add and remove items to understand the algorithm. Visual.
Add rows and columns, merge cells, and set gaps visually. Get the grid‑template CSS and HTML. Fast layout prototyping.
Choose a property, duration, and bezier curve. Trigger the transition and see the animation. Copy the complete CSS rule.
Test how your page loads under slow, 3G, or offline conditions by intercepting fetch and applying delays. No DevTools needed.
Connect oscillators, gain nodes, and filters with a visual graph. Hear the result in real time. Learn Web Audio interactively.
Enter text and see each character's 8‑bit binary laid out in a black‑and‑white grid. Beautiful data art. Local.
Evaluate password strength through a short interactive story where each character set adds lines to a narrative. Educational fun.
Click to see a famous physics formula rendered in LaTeX, with a short description. For daily science inspiration. All local.
Measure your internet connection speed by downloading and uploading a small test file. Works from your browser.
Attempt to detect your current DNS resolver IPs using DNS‑leak test queries. Educational. Privacy‑friendly.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.
Enter a number and see its Collatz sequence graphed. Watch the steps until it reaches 1. Mesmerizing math.
Press any key and see it light up on a standard QWERTY layout. Check functionality or demonstrate shortcuts.
Set a cron expression and see a calendar of the next 1,000 execution times. Never miss a schedule again.
Watch classic sorting algorithms step through a randomized bar chart. Adjust speed and array size. Great for learning algorithm efficiency.
Generate valid, random unicast MAC addresses for testing or spoofing. Select OUI prefix if desired. Local only.
An animated hourglass that you can set for any time. Watch the sand flow. Beautiful and calming timer.
Build a GraphQL query by selecting fields and nesting visually. Copy the built query string. For learning and fast prototyping.
Create simple 2‑ or 3‑set Venn diagrams by entering comma‑separated lists. Shareable via URL fragment. No account.
Enter a number and see an animated factor tree breaking it down to primes. Perfect for teaching factorization.