Mockingboard

No accounts, no upload servers, no settings. Drop your screenshots in, rearrange them, and export one PNG.

Everything stays on your machine

There is no backend. Images never leave the browser — layout, reordering, and export all happen client-side, and your board persists in localStorage so it survives a refresh. Nothing to sign up for, nothing to delete later.

Details that took the longest

A masonry layout that reflows as tiles change size. Drag-to-reorder that is fully keyboard accessible, not just pointer-driven. And export at three scales, with iOS canvas-limit detection — mobile Safari silently caps canvas area, so the export warns you before it would have quietly produced a blank image.