Know what has—and has not—been checked.

Software checks cover nominal geometry and file output. Physical fit and real-user usefulness remain separate questions.

Calculation checks

Fixed examples verify expected panel and flat dimensions. Boundary tests check invalid inputs, per-side clearance, outline intersections, tab limits and sheet rotation. Opposing glue tabs are limited so they do not overlap along the side wall in the nominal model.

Exported file checks

Downloaded SVG files declare physical dimensions in millimeters. PDF files use 72 points per inch, with 25.4 mm per inch. Independent parsing checks the Letter page size, the outlines of all three reference templates, a rotated example, A4 output and the 50 mm calibration line.

Rendered PDF pages are visually inspected for cut lines, fold lines, glue areas and readable instructions. The printing application and the printer can still change the final paper output.

Batch and input checks

Fractional inches are checked against decimal equivalents. Batch checks verify exact copy counts, sheet boundaries, cutting gaps, rotation and the final fold-guide page across supported paper sizes. A submitted note is only confirmed after the server reports that it was stored.

Browser checks

Automated Chrome checks exercise template selection, units, invalid inputs, sheet fit and actual download events. Additional checks cover saved-design round trips, rejected files, help pages, the feedback workflow and small-screen layouts. This is not a claim of certification for every browser or device.

Still to check on real paper

1. Print at 100% and measure the calibration line.
2. Cut and score one sample of each shape.
3. Record paper thickness, printed dimensions, folding and glue behavior.
4. Test a lid against the actual outside size of an assembled tray.

Still to check with real users

Five target tasks will be compared with existing tools: a narrow sleeve, an inch-based tray, a lid for a real tray, a paper-size failure, and a calibrated home print. No results have been collected yet. A completed download alone does not prove a successful fold, a better task experience or willingness to pay.

Record a trial result →