Free Sovereign Tools for Students & Engineers

Search and launch all 54 free online puzzle, game, cipher, mathematics, and science solvers. Instant backtracking, exact Gaussian elimination, A* heuristic pathfinding, and playable game generators.

Sudoku, Killer Sudoku, Nonograms (Picross), KenKen, Futoshiki, Kakuro, Hashi Bridges, Slitherlink, Star Battle, Flow Free, and Lights Out.

3D Rubik's Cube CFOP solver, Minesweeper Bayesian probability engine, Water Sort pour optimizer, 15-Puzzle A* solver, Mastermind minimax, and Sokoban.

Anagram solver with wildcards, Crossword pattern filter, Wordle 5-letter candidate ranker, Word Ladder shortest path, 2D Word Search, and Cryptograms.

Multi-cipher auto-cracker, Caesar 25-shift table, Morse code Web Audio synthesizer, Binary/Hex/ASCII, Pigpen Masonic SVG keyboard, and Braille cells.

24 Game / target arithmetic search, Sequence pattern detective, Quadratic equations, 2x2 & 3x3 Gaussian elimination, Fractions, and Plane Geometry.

Chemical reaction equation balancer, Stoichiometry limiting reagents, Aqueous pH & titration curves, Mechanics Free-Body Diagrams, and Collisions.

Combine multiple PDFs, extract specific pages, reduce file size, rotate pages, add watermarks, and extract text from scanned pages.

Edit Markdown with live KaTeX math formulas, interactive Mermaid diagrams, Draw.io vector flowcharts, and custom font PDF exporting.

Convert Word .docx files into clean Markdown or HTML (headings, lists, tables, images), and turn Markdown outlines into editable PowerPoint decks.

Real-time Mermaid.js diagram editor, hardware pipeline presets, sequence flows, state machines, Draw.io integration, and vector SVG/PNG export.

Draw WaveDrom-style timing diagrams, function plots, contour maps and rotatable 3-D surfaces from short JSON specs; export SVG/PNG or embed them in notes.

Test regular expressions in real-time with capture group breakdown, match index table, and code generation for Python, C++, JS, and Rust.

Clean messy markup, strip inline styles, purge specific classes or attributes, remove empty tags, sanitize Word-pasted HTML, and minify.

Format, validate, and minify JSON, convert to YAML/CSV, and auto-generate TypeScript interfaces, Rust serde structs, and Python Pydantic models.

Compare two source code files, configurations, or text passages with character-level accuracy, addition/deletion stats, and whitespace ignore.

Calculate SHA-256/512 digests, encrypt with AES-256-GCM, inspect and decode JSON Web Tokens (JWT), encode Base64/Hex, and generate UUIDs.

Solve 2, 3, and 4-variable K-Maps with interactive minterm grids, grouping loops, simplified Sum-of-Products (SOP), and synthesizable Verilog code.

Convert between Decimal, Binary, Hex, Two's Complement, and view interactive bit breakdowns of 32-bit and 64-bit IEEE 754 Floating Point values.

Calculate determinants, inverse matrices, products, eigenvalues, and transpose with clean step-by-step mathematical working.

Write equations with live rendering, convert references to BibTeX, and generate formatted APA, IEEE, and Chicago bibliography citations.

Generate audio waveforms, mix harmonic frequencies, and inspect real-time Fast Fourier Transform (FFT) frequency spectrum displays.

Convert units across pressure, energy, temperature, and data storage, plus generate complete Boolean algebra truth tables.

Chat with advanced AI models right in your browser. Ask questions about math, code, engineering concepts, or get explanations for your homework with zero setup.

Inspect generated assembly in real-time across GCC, Clang, MSVC, and Rust with full compiler optimization flags (-O3).

Run synthesizable SystemVerilog, VHDL, and UVM simulations in your browser with Synopsys VCS, Cadence, and Aldec engines.

Interactive electronic circuit simulator demonstrating current flow, op-amps, transistors, logic gates, and oscillators.

Simulate microcontrollers, sensors, LCDs, and WiFi communication directly in browser without buying physical dev boards.

See C++ code through compiler eyes: expands template instantiations, lambda closures, structured bindings, and move semantics.

Interactive deep dive into how CPUs, system calls, virtual memory, and operating systems execute your code on silicon.