Ideas, tools, and creative exploration
Interactive tools, games, simulators, labs, and code libraries — all built from scratch.
Advanced utilities — logo makers, planners, and more. PWA-ready.
ExploreCalculators, converters, generators, and productivity utilities.
ExploreClassic and puzzle games — play directly in the browser.
ExplorePhysics, algorithms, and systems visualization.
ExploreStep-by-step labs on programming concepts and data structures.
ExploreCode snippets and reference material by language.
ExploreEngineering deep-dives, dev patterns, and software craftsmanship.
ExploreAdvanced utilities — installable as PWA for desktop-like experience.
Browser-based flowchart and diagram editor with 10 node types, orthogonal connection routing, snap-to-grid, and PNG/SVG/JSON export.
Professional print preparation tool for imposing, arranging, and preparing documents for printing. Supports PDF and image uploads, multi-up layouts (1/2/4 per side), duplex printing, banner overlays, page numbering, crop marks, and batch PDF export.
Professional resume and CV builder with 6 templates, drag-to-reorder sections, live preview, and PDF/PNG/HTML export.
Professional logo design studio with 50+ fonts, 20 shapes, image filters, gradient fills, save/load projects, and export as PNG, JPEG, WebP, or SVG.
Browser-based pixel art editor with layers, animation frames, symmetry drawing, onion skinning, and PNG/GIF/sprite sheet export.
Duplicate and tile images onto print sheets with bleed, crop marks, flexible measurement units, image adjustments, and print-ready export.
Most-used utilities by the community.
Full scientific calculator with trigonometry, logarithms, powers, memory, and calculation history.
Create bar, line, pie, and donut charts from your data, download as PNG.
Design custom logos with text, shapes, images, 36+ fonts, rotation, undo/redo, and export as PNG or SVG.
Generate Code128, EAN-13, and UPC-A barcodes from text or numbers.
Build beautiful linear and radial CSS gradients with a visual picker. Copy the CSS code instantly.
Toggle Unix file permission bits and get the numeric and symbolic chmod notation instantly.
Jump into a quick game — no downloads needed.
Fill the entire board with one color in as few moves as possible!
Aim and shoot bubbles to match colors and clear the board!
Color the map using only 4 colors — no two adjacent regions can share a color!
Aim and click to shoot ducks flying across the sky!
Tap to fly through the pipes — a simple but addictive arcade challenge.
A strategic solitaire game — all cards are visible from the start!
Interactive visualizations for physics, algorithms, and systems.
Explore cellular automata — watch simple rules create complex, emergent patterns.
Watch sorting algorithms in action with colorful animated bar charts.
Simulate CPU scheduling algorithms — FCFS, SJF, Round Robin, and Priority scheduling.
Insert, search, and delete nodes in a binary search tree with real-time visualization.
Build and run finite state machines — define states, transitions, and test input strings.
Visualize hash table insertions, lookups, and collision resolution strategies.
Step-by-step educational experiences to level up your skills.
Visualize singly and doubly linked lists — insert, delete, search, and traverse nodes interactively.
Understand RGB, HSL, and hex colors — build palettes and explore contrast with interactive pickers.
Learn JSON syntax, parse and build data structures, and explore how REST APIs work interactively.
Master map, filter, reduce, and more — transform arrays with live code exercises and visual diagrams.
Watch Bubble Sort, Selection Sort, and Insertion Sort in action with animated bar charts.
Learn to query databases with SQL SELECT — filter, sort, and transform data interactively.
Curated code snippets and reference material by language.
A comprehensive zero-dependency PHP utility toolkit with 80+ helper methods for strings, arrays, dates, validation, security, HTTP, and file operations.
A zero-dependency PHP library providing 6 typed data structures with 60+ methods: Stack, Queue, Collection, Set, TypedArray, and Pair.
A zero-dependency CSS utility toolkit with 70+ utility classes, animations, pure-CSS components, and a design-token system for layout, typography, effects, and responsive design.
A zero-dependency PHP library implementing 6 advanced software patterns with 50+ methods: Pipeline, Result, EventEmitter, Container, Retry, and CircuitBreaker.
Fresh content, straight from the keyboard.
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