Word Ladder
Turn one word into another — one letter at a time, in 3 steps.
Generating puzzle…
How to play
- 1You are given a start word and a target word — both 4 letters long.
- 2Change exactly one letter to make a new valid word. Type it in and hit Submit.
- 3Repeat for up to 3 steps. Your final word must be the target.
- 4Every word you enter must be in the dictionary — no made-up words!
Tips for solving Word Ladder puzzles
Work from both ends
Instead of only thinking forward from the start word, also think backward from the target. What words are one letter away from the target? If one of those words is also one letter away from the start, you have found your middle step. This bidirectional approach dramatically reduces the search space.
Change the hardest letter first
If the start and target words differ in three positions, identify which position is hardest to change last and change it first. Common vowels (A, E, I, O) are easier to route through than uncommon consonants. Getting the difficult letter out of the way early gives you more flexibility in the remaining steps.
Use common consonants as stepping stones
Letters like R, S, T, N, and L appear in a huge number of 4-letter words. If you can route your path through a word containing one of these letters in the right position, you will almost always find a valid next step. Words like RATE, LATE, LANE, BARE, BORE, and CORE are excellent stepping stones because they connect to dozens of neighbors.
Think about vowel positions
Most 4-letter words follow a consonant-vowel-consonant-consonant or consonant-vowel-consonant-vowel pattern. When you change a vowel, you open up a wide range of new words. When you change a consonant, the options are more constrained. Planning which positions to change in which order — vowels or consonants first — can make the difference between finding a path and getting stuck.
The history of Word Ladder puzzles
Word Ladder was invented by Lewis Carroll — the author of Alice in Wonderland — in 1877. Carroll called the game 'Doublets' and published a series of puzzles in Vanity Fair magazine. The original rules were identical to the modern game: transform one word into another by changing one letter at a time, with every intermediate step being a valid word.
Carroll was fascinated by wordplay and logic puzzles throughout his life. He invented dozens of word games, but Doublets became one of his most popular creations. His original puzzles included transforming HEAD into TAIL, WHEAT into BREAD, and POOR into RICH — classic pairs that remain satisfying to solve today.
The game was renamed 'Word Ladder' in the 20th century and has appeared in countless puzzle books, newspapers, and magazines ever since. It became a popular feature in the New York Times puzzle section and has been adapted into numerous digital formats. The game's enduring appeal lies in its elegant simplicity: the rules fit in one sentence, but finding the optimal path requires genuine linguistic creativity.
Word Ladder puzzles are also used in computer science education to illustrate graph theory and breadth-first search algorithms. Each word is a node in a graph, and two words are connected if they differ by exactly one letter. Finding the shortest path between two words is a classic BFS problem — the same algorithm that powers the puzzle generator on this page.
Built and maintained by Steve
Retired aerospace engineer and lifelong Scrabble and crossword player. I built WordSoup.pro because I wanted fast, private word tools that actually work. Read more →
Frequently asked questions
Word Ladder was invented by Lewis Carroll — the author of Alice in Wonderland — in 1877. He called the game 'Doublets' and published puzzles in Vanity Fair magazine. Carroll was a mathematics lecturer at Oxford and had a lifelong passion for logic puzzles and wordplay. His original Doublets puzzles included transforming HEAD into TAIL and WHEAT into BREAD, which remain classic Word Ladder challenges today.