Visual Sudoku solver in the browser
Hello! I recently wanted to learn a bit about computer vision. Initially, I wanted to build something which could solve a jigsaw puzzle, but figured I should start with something (much) simpler, so I've built this instead. This is a visual Sudoku solver which runs in the browser. It works by using OpenCV to identify and process the Sudoku grid, passing this to a simple ML model to identify the digits, and then solving the puzzle with a backtracking algorithm. The ML model was trained on the TMNIST data set using a model built with Keras, also a completely new area to me. It's far from…
Visual Sudoku solver in the browser launched on August 20, 2024 with 63 votes, #743 of 5,471 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Visual Sudoku Solver is a browser-based tool that solves Sudoku puzzles from images or camera input. It uses OpenCV to detect and process the grid, a machine learning model trained on handwritten digits to recognize numbers, and a backtracking algorithm to solve the puzzle. The application works best with well-lit, clearly photographed puzzles and was built as a learning project exploring computer vision and neural networks.
written from the facts on this page · September 2026
From the sources
Use this Visual Sudoku Solver to instantly solve Sudoku puzzles with your camera. Just point, scan, and solve! Ideal for Sudoku fans looking for a quick and easy solution. Try it now.
This app lets you solve Sudoku puzzles by simply pointing your camera at them. It's a project I built to learn and experiment with computer vision and machine learning. I built this mainly for my own learning, so it's definitely not perfect. Some more common issues are: If you'd like to learn more about how I built this, I documented a lot of the progress in python notebooks which are available on Githubfrom sudoku.dotslashdan.com
In the maker’s words, at launch
Hello! I recently wanted to learn a bit about computer vision. Initially, I wanted to build something which could solve a jigsaw puzzle, but figured I should start with something (much) simpler, so I've built this instead. This is a visual Sudoku solver which runs in the browser. It works by using OpenCV to identify…
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