Crossword Builder - Online Create & Solve Simple Puzzles
Build a small crossword by adding words and clues. Export as a printable grid or solve in browser. Perfect for classrooms.
UD5 Toolkit
Design your own crossword puzzle by setting the grid size, placing black squares, and typing letters. Use the auto-numbering to generate clues, then print or export your puzzle.
Build a small crossword by adding words and clues. Export as a printable grid or solve in browser. Perfect for classrooms.
Create or solve logic grid puzzles (like Einstein's riddle). Enter clues and mark the grid. Practice logical deduction. Local only.
Type names and generate folded name tents for desks. Print, cut, fold. Great for workshops and panels.
Visually name grid areas in a table and generate grid‑template‑areas CSS. Perfect for complex layouts. Drag‑free.
See how grid-auto-flow: row vs column changes item placement. Add and remove items to understand the algorithm. Visual.
Enter text and see each character's 8‑bit binary laid out in a black‑and‑white grid. Beautiful data art. Local.
Multiple digital counters for tracking stitches, rows, and pattern repeats. Increment, reset. Works on mobile.
Upload a small image and see it tiled as a canvas pattern. Export the pattern or copy the JavaScript.
Create a repeating text pattern from a short string for watermarking documents or images. Download SVG pattern.
Use named grid lines instead of column numbers. See how they simplify placement. Visual, interactive learning.
Create vertically oriented text layouts with `writing‑mode`. See the effect and copy the complete CSS. For vertical languages.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.
Click a letter and watch an animated stroke order for print or cursive. Good for kids learning to write.
Create categorized shopping lists (produce, dairy, meat, etc.). Add items, check them off, and print. Data stored in your browser. Never lose a list.
Create a weighed pros and cons list with a score. Help make tough decisions. Data saved locally.
Generate customizable alphabet tracing sheets with uppercase and lowercase letters. Select letters to focus on. Instant print. Local only.
Select a story theme, input nouns, verbs, etc., and generate a hilarious story. No ads.
Draw walls on a grid and watch A*, Dijkstra, or BFS find the shortest path. Interactive animation. Learn graph traversal.
Drag colored beads onto a virtual thread to design a repeating pattern. See total length. Save locally.
See the difference between clone and slice on inline boxes that break across lines. Useful for multi‑line headings.
Watch classic sorting algorithms step through a randomized bar chart. Adjust speed and array size. Great for learning algorithm efficiency.
Generate cryptographically secure BIP39 mnemonic phrases (12 or 24 words) for HD wallet seeds. All entropy generated locally.
Build a vertical timeline by entering events with dates and descriptions. Export as image or HTML. Perfect for project milestones.
Enter a list of buzzwords or concepts and shuffle them into random pairs. Stimulate creative thinking. All local.
Paste HTML and see the order in which elements would receive focus via Tab key. Highlight issues. Local accessibility testing.
Compare break‑all, keep‑all, and overflow‑wrap: anywhere/break‑word. Paste long words and see how they wrap.
Style underlines, overlines, and strike-throughs with colors, wavy styles, and thickness. Modern CSS text‑decoration.
Enter a number and see an animated factor tree breaking it down to primes. Perfect for teaching factorization.
Generate a balanced lunchbox meal suggestion (main + sides) with a click. Prevent lunch rut. No account, local.
Upload a main image and a folder of tile images, and the tool creates a photomosaic. Rendered in canvas. All local.