Free Online Puzzle Solvers

Every free puzzle solver in one place.

Browse, search, and filter all the free online puzzle solvers available on SolverBox. From Sudoku to anagrams to game lockpick helpers — find the right solver instantly.

54 puzzle solvers found

Sudoku Solver

Enter any 9×9 Sudoku grid and get the unique solution in milliseconds using a backtracking algorithm.

Number Puzzles Free Browser-based
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Nonogram Solver

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

Logic Puzzles Free Browser-based
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KenKen Solver

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

Number Puzzles Free Browser-based
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Killer Sudoku Solver

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

Logic Puzzles Free Browser-based
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Cryptogram Solver

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

Word Games Free Browser-based
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Mastermind Solver

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.

Game Solvers Free Browser-based
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Minesweeper Solver

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

Game Solvers Free Browser-based
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Futoshiki Solver

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

Logic Puzzles Free Browser-based
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Hashi Solver

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

Logic Puzzles Free Browser-based
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Anagram Solver

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

Word Games Free Browser-based
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Crossword Solver

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.

Word Games Free Browser-based
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Word Puzzle Solver

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.

Word Games Free Browser-based
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Lockpick Solver

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

Game Solvers Free Browser-based
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Kakuro Solver

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

Number Puzzles Free Browser-based
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Word Search Solver

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

Word Games Free Browser-based
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Sliding Puzzle Solver

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.

Number Puzzles Free Browser-based
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Lights Out Solver

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.

Logic Puzzles Free Browser-based
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Water Sort Puzzle Solver

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.

Game Solvers Free Browser-based
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Logic Grid Puzzle Solver

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

Logic Puzzles Free Browser-based
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Cipher Decoder

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

Word Games Free Browser-based
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Color Puzzle Solver

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.

Logic Puzzles Free Browser-based
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Number Puzzle Solver

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

Number Puzzles Free Browser-based
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Sequence Solver

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

Number Puzzles Free Browser-based
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Equation Solver

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

Number Puzzles Free Browser-based
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System of Equations Solver

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.

Number Puzzles Free Browser-based
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Algebra Solver

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

Number Puzzles Free Browser-based
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Fraction Solver

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.

Number Puzzles Free Browser-based
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Ratio and Proportion Solver

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

Number Puzzles Free Browser-based
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Geometry Solver

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.

Number Puzzles Free Browser-based
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Coordinate Geometry Solver

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.

Number Puzzles Free Browser-based
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Physics Problem Solver Hub

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.

Logic Puzzles Free Browser-based
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Mechanics Reasoning Solver

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.

Logic Puzzles Free Browser-based
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Physics System Constraints Solver

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.

Logic Puzzles Free Browser-based
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Physics Interaction Solver

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.

Logic Puzzles Free Browser-based
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Chemical Reaction and Stoichiometry Solver

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.

Number Puzzles Free Browser-based
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Aqueous Solution, Acid-Base and Titration Solver

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.

Number Puzzles Free Browser-based
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Chemical Formula and Molecular Structure Solver

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.

Number Puzzles Free Browser-based
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Loop Puzzle Solver

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.

Logic Puzzles Free Browser-based
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Queens and Star Battle Solver

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.

Logic Puzzles Free Browser-based
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Path Connection Puzzle Solver

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.

Logic Puzzles Free Browser-based
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Sokoban Solver

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.

Game Solvers Free Browser-based
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Matchstick and Seven-Segment Puzzle Solver

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.

Logic Puzzles Free Browser-based
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Riddle and Brain Teaser Solver

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.

Word Games Free Browser-based
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Book of Answers Online

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.

Game Solvers Free Browser-based
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5 Letter Word Finder

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.

Word Games Free Browser-based
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Word Ladder Solver

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.

Word Games Free Browser-based
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Scientific Calculator Solver

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.

Number Puzzles Free Browser-based
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Rubik’s Cube Solver

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.

Game Solvers Free Browser-based
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Morse Code Solver

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.

Word Games Free Browser-based
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Caesar Cipher Solver

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.

Word Games Free Browser-based
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Binary Code Solver

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.

Word Games Free Browser-based
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Pigpen Cipher Solver

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.

Word Games Free Browser-based
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Braille Code Solver

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.

Word Games Free Browser-based
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Polybius Square Solver

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.

Word Games Free Browser-based
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Free puzzle solver tools — FAQ

Everything you need to know about SolverBox's free online puzzle solvers.

How many free puzzle solvers does SolverBox have?

We're continuously adding free online puzzle solvers. Current live tools include Sudoku Solver, Anagram Solver, Crossword Solver, Nonogram Solver, KenKen Solver, Cryptogram Solver, Mastermind Solver, Minesweeper Solver, Logic Grid Puzzle Solver, Futoshiki Solver, Hashi Solver, and more. Check this page regularly for new additions.

Can I suggest a new free puzzle solver tool?

Yes! We love solver requests. Contact us at hi@solverbox.net with the puzzle type you need and we'll prioritize it in our roadmap.

Do the free puzzle solvers work on mobile?

All SolverBox puzzle solvers are fully responsive. The Sudoku grid, word input forms, and result displays adapt to any screen size — phones, tablets, and desktops.

Are the free puzzle solvers really free forever?

Yes. SolverBox is committed to keeping all puzzle solver tools free. We sustain the site through non-intrusive ads, not by charging users.

Can't find the puzzle solver you need?

We add new free online puzzle solvers regularly.

Tell us what you're looking for and we'll build it.

All suggestions welcome — no account required to request.