Split Images Into Equal Grid Tiles Split a single image into a grid of equal-sized tiles for Instagram grids and puzzles.

Under the hood, the tool utilizes React hooks such as useState, useRef, useCallback, and useEffect to manage state changes and handle image processing efficiently. When an image file is dropped into the FileDropzone component, it triggers a callback function that sets the image state using URL.createObjectURL to create a temporary URL for the uploaded file. The useEffect hook ensures that this temporary URL is revoked when the image is no longer needed, preventing memory leaks.

The tool employs the Canvas API to extract individual tiles from the source image. Specifically, it uses the drawImage method with calculated source rectangle parameters based on the specified rows and columns. This allows for precise cropping of each tile region. The resulting tiles are stored as data URLs in an array using the toDataURL method of the canvas context. Each tile object contains its corresponding row and column indices, facilitating easy identification and reassembly.

The download functionality relies on creating a new anchor element with a dynamically generated filename based on the tile's position in the grid. When the user clicks on a tile or the "Download All" button, it simulates a click event on this anchor element, triggering the browser to initiate a file download using the data URL as the source. This approach enables users to save individual tiles or all tiles at once without requiring server-side processing. The tool also uses TypeScript for type checking and React's JSX syntax for templating, ensuring maintainable and efficient code.