Every free puzzle solver in one place.

Enter or paste any 9×9 Sudoku, get the solution in milliseconds, or follow step-by-step hints that explain each move.

Enter Picross, Griddlers, or Japanese crossword row and column clues to solve black-and-white logic grids locally in your browser.

Enter KenKen, Calcudoku, or MathDoku cage targets and operations to solve Latin-square math grids locally in your browser.

Enter a 9×9 Killer Sudoku grid with cage sums to solve answers, cell candidates, sum combinations, and cage conflicts locally.

Paste cryptograms, substitution ciphers, Caesar shifts, ROT13, or Atbash puzzle text to inspect frequency, patterns, and live decoding locally.

Enter Mastermind, Bulls and Cows, or Code Breaker guesses with black/white or bulls/cows feedback to narrow candidates and get the next suggested guess.

Mark opened numbers, unknown squares, and known mines to find guaranteed safe cells, guaranteed mines, mine probabilities, and a cautious next move.

Enter Futoshiki givens and greater-than or less-than signs to solve inequality puzzles with Latin-square row and column rules locally.

Enter Hashi, Bridges, or Hashiwokakero island positions and numbers to solve bridge counts, crossings, connectivity, no-solution, and multi-solution checks locally.

Enter scrambled English letters, including optional ? wildcards, to find local word-list matches grouped by length for anagrams, word scrambles, and casual word games.

Type a letter pattern like c???w??d or ?a?e, then filter local word-list matches by length, known positions, starts/ends, included letters, and excluded letters.

Enter known letters, word length, required letters, excluded letters, fixed positions, and wrong-position rules to filter English words for Wordle-style, Spelling Bee, word ladder, and daily word puzzle play.

Enter fictional game pin states, targets, and click rules to calculate step-by-step paths for abstract lockpick-style puzzle minigames.

Enter black cells, blank cells, across sums, and down sums to solve Kakuro number crosswords with candidate combinations, exclusions, conflicts, and uniqueness checks.

Paste a letter grid and target word list to locate hidden words horizontally, vertically, diagonally, and backward with highlighted paths and copy-ready answers.

Enter an 8-puzzle, 15-puzzle, or number sliding puzzle arrangement to check solvability, blank position, move directions, board states, and shortest or heuristic steps.

Enter a 3×3, 4×4, or 5×5 Lights Out, Toggle Puzzle, or Light Switch Puzzle board to find the clicks that turn every light off or on.

Enter bottle color stacks for Water Sort Puzzle, Ball Sort Puzzle, or Liquid Sort levels to search feasible pour steps, bottle states, total moves, and search-limit status in your browser.

Build people, item, place, order, or custom categories, add structured yes/no clues, manually mark matrix cells, and inspect candidates, conflicts, and final matches.

Paste simple puzzle cipher text to compare Caesar shifts, ROT13, Atbash, letter frequency, substitution mappings, decoded preview, and conflict warnings in one browser tool.

Enter a small toggle color grid, color cycle, neighbor impact rule, and target color state to find click steps, board changes, rule notes, and no-solution results.

Enter a target number and up to 6 available numbers to search local arithmetic expressions with +, −, ×, ÷, parentheses, multiple solutions, steps, and no-solution notes.

Enter a number sequence to check arithmetic, geometric, square, cube, Fibonacci, and finite-difference patterns locally, then compare possible next terms and formulas.

Enter one-variable equations or simple inequalities to solve linear, quadratic, and factorable polynomial problems locally with steps, checks, and copyable answers.

Enter 2×2 or 3×3 linear systems to solve x, y, and z locally with normalized equations, coefficient matrices, elimination steps, solution type checks, substitution verification, and copyable answers.

Enter algebra expressions to simplify, expand, combine like terms, factor simple quadratics, inspect exponent hints, and simplify basic radicals locally in your browser.

Enter fractions, decimals, or mixed numbers to add, subtract, multiply, divide, simplify, convert, compare common denominators, and copy step-by-step answers locally in your browser.

Enter ratios, proportions, equivalent ratios, cross multiplication problems, or scale factor relationships to solve missing values locally in your browser.

Choose a common plane shape and enter known side lengths, angles, radius, diameter, or height to calculate area, perimeter, missing sides, missing angles, validity, and step-by-step formulas locally in your browser.

Enter two points, three points, or two lines to calculate slope, distance, midpoint, line equations, intercepts, parallel checks, coincident lines, intersections, and step-by-step results locally in your browser.

Paste a physics word problem or add simple known values to classify the model, find missing information, choose a SolverBox path, and map the reasoning route without calculating a final answer.

Paste a force, motion, or torque physics prompt to build a modeling framework: system choice, free-body structure, force directions, ΣF = ma readiness, coordinate decomposition, torque insight, and the recommended Newton, equilibrium, or dynamics path.

Paste a connected-object physics prompt to analyze system structure, rope, pulley, rigid, hinge, or contact constraints, conceptual velocity and acceleration relations, degree-of-freedom changes, and equation setup hints without numerical solving.

Paste a collision, explosion, separation, momentum exchange, or energy-change physics prompt to classify the interaction type, conservation assumptions, direction logic, qualitative outcome trend, and recommended model without numerical calculation.

Enter a basic chemical equation plus known mass, moles, particles, gas volume, actual yield, temperature, and pressure to balance reactions and calculate mole ratios, limiting reagents, theoretical yield, percent yield, and gas stoichiometry locally.

Enter mass, moles, molarity, volume, acid/base type, Ka, Kb, pKa, pKb, titrant concentration, and titrant volume to classify solution problems and calculate concentration, dilution, pH, pOH, neutralization, weak acid/base estimates, titration equivalence, and basic buffer checks locally.

Enter formulas, ion charge, element masses, mass percentages, formula mass, relative molecular mass, or molar mass to derive empirical and molecular formulas, then inspect formula mass, valence electrons, Lewis hints, formal charge, VSEPR geometry, hybridization, and polarity trends locally.

Enter Slitherlink numbers or Masyu black and white pearls to solve one non-branching closed loop, with confirmed edges, excluded edges, clue counts, violations, no-solution, and multi-solution checks locally.

Draw regions, choose Queens or Star Battle mode, add known pieces or excluded cells, then solve row, column, region, and no-adjacent constraints locally in your browser.

Enter paired number or color endpoints on a grid to solve non-crossing continuous paths for Numberlink, Flow Free, Arukone, and pair path puzzles, with optional full-board coverage checks.

Enter a small Sokoban level with walls, player, boxes, targets, and boxes on targets to search push routes, movement steps, dead-corner warnings, and browser budget status locally.

Enter a typed matchstick puzzle with seven-segment digits, operators, equals signs, or Roman numerals, then enumerate all valid one-match or two-match moves locally.

Enter a short English riddle, brain teaser, What Am I prompt, trick question, or kids riddle to match likely answers, hints, aliases, explanations, and similar riddles locally in your browser.

Ask silently or type a short question, then open a browser-local answer book for a random reflection prompt, direction tag, history, favorites, and shareable answer card.

Enter Wordle-style five-letter guesses, mark each tile green, yellow, or gray, then filter possible answers, explain duplicate-letter limits, and get Answer Mode or Exploration Mode next-guess suggestions locally.

Enter two same-length English words to find the shortest Word Ladder path, check a pasted ladder, or generate Doublets and word morph practice locally in your browser.

Type or tap a scientific calculator expression with trig, logs, powers, roots, percentages, factorials, Ans, DEG/RAD mode, and scientific notation, all calculated locally in your browser.

Enter all six faces of a standard 3x3 cube on a 2D net, check color counts and solvability locally, then get step-by-step recovery moves plus notation help and practice scrambles.

Paste Morse dots, dashes, spaces, slashes, or plain English to decode puzzle clues, translate text to Morse code, inspect character breakdowns, review unspaced candidates, and copy browser-local results.

Paste Caesar, ROT13, ROT, or simple shift-cipher puzzle text to try shifts 1-25, highlight likely English, inspect character shifts, and encode plain English locally.

Enter binary, ASCII numbers, hex, decimal bytes, or plain text to translate puzzle clues between Binary, Text, ASCII, Hex, and Decimal locally in your browser.

Click Pigpen Cipher symbols to decode English puzzle clues, or type plain English to generate Pigpen symbols with an alphabet chart, symbol-by-symbol notes, and copy-ready results.

Enter Unicode braille characters, plain English, or Chinese text to decode braille puzzle clues, translate text or pinyin to braille, inspect dot cells, review number and capital signs, and copy browser-local results.

Enter 5x5 coordinate cipher text, Tap Code, Knock Code, or plain English to decode Polybius Square clues, encode text to coordinates, inspect I/J merging, invalid pairs, and copy local results.