100% Client-Side Engine
Our solver logic is downloaded once and runs entirely in your browser RAM, guaranteeing instantaneous millisecond solving.
Master every Letter Boxed puzzle.
LbSolver is a comprehensive, blazing-fast toolkit. Instantly solve complex boards, trace official daily answers through beautiful animations, and practice chaining words in unlimited mode.
Everything you need to play better
Four powerful tools bundled into one blazingly fast workspace.
Solver Engine
Get instant 1-to-6 word combinations using our lightning-fast, entirely client-side word search algorithm.
Solve a PuzzleDaily Answer
Skip the struggle. View the official answer for today along with an interactive, animated board playback.
See Today's AnswerPuzzle Archive
Dive into our extensive library of historical daily puzzles. Load up past boards and challenge yourself.
Browse ArchiveUnlimited Play
Practice chaining words together with an infinite supply of procedurally designed and verified game boards.
Play UnlimitedDaily Automatic Syncing
Our systems index the newest New York Times puzzles automatically right at midnight, updating the Today page constantly.
Robust Puzzle Verification
Every board generated in the Unlimited Game mode is pre-computed through our solver to guarantee at least one valid combination.
Frequently Asked Questions
Learn exactly how the rules of Letter Boxed work.
Letter Boxed is a popular word puzzle where letters are placed around a square. Your goal is to build word chains using all the letters, while strictly avoiding picking consecutive letters from the exact same side.
LbSolver uses an instantaneous in-browser search algorithm. By entering the four sides into the Solver, we scan the entire dictionary to provide you with all valid chains from 1-word up to 6-words long immediately.
Yes. Our Archive page lets you browse historical puzzles by date, check the official New York Times answers, and even send past puzzle boards directly into our solver to find alternate solutions.
Absolutely. Head to the Unlimited Game section. It generates fresh, verified solver-friendly puzzles dynamically so you can practice your chain-building speed as much as you want.