AutoAlbum
A stamp album page designer that treats millimetres as millimetres. Enter your stamps' real dimensions, choose an archival frame, and export a vector PDF that prints at exactly 1:1 on A4. It runs entirely in the browser, so nothing you design is ever uploaded.
Next.js · TypeScript · jsPDF · Tailwind
The problem it solves
Collectors lay out album pages in a word processor, then discover at the printer that the page has been helpfully scaled to fit. Mounts specified at 26mm arrive at 24.7mm, and a page of carefully aligned stamps no longer aligns with anything.
The failure is that the software never knew it was working in millimetres. It was working in points, or in percentages of a page, and the physical dimension was an accident of the export settings.
One source of truth, in millimetres
The rule that makes the 1:1 promise hold is that a single layout module decides where everything goes, in millimetres, and nothing else is allowed an opinion. Mount sizing, printable-area metrics, row packing, page overflow, magnetic snapping and align-and-distribute all live there.
The on-screen sheet is a mirror of the PDF writer rather than a separate renderer: it takes the same numbers and multiplies by a pixels-per-millimetre factor. A calibration sheet lets you correct that factor for your own display, so the preview can be trusted at full size too, and the PDF writer emits vectors from the same measurements rather than rasterising anything.
Nothing leaves your machine
It ships as a static export with no backend. There is no account, no upload, no analytics, and no server that could hold your collection even in principle. Projects live in local storage, artwork in IndexedDB, and a project exports to a JSON file you keep.
A catalogue of what someone owns and what it is worth is not data that should sit on someone else's computer, and the simplest way to guarantee that is to have no computer for it to sit on.
The rest of it
Eight preset collections and the standard stamp formats, so a common album does not need setting up from scratch. Import from existing documents, bulk entry for a run of similar stamps, snapshot undo and redo throughout.
Beyond the album pages themselves the PDF writer produces two other things worth having: a calibration sheet for the screen, and a cutting template. There is also a printing manual covering what goes wrong between a correct PDF and a correct sheet of paper, which is where most of the remaining failures actually live.