PDF Scale Verifier
Upload your pattern PDF and we'll check the page size, detect test squares, and flag potential scale issues — before you print a single page.
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Drop your pattern PDF here, or click to browse
We'll check page dimensions, detect test squares, and verify the PDF is at correct scale.
What this checks
Page dimensions:Verifies that the PDF pages are standard Letter (8.5 × 11") or A4 (210 × 297 mm). Non-standard page sizes can cause scaling issues when printing.
Page consistency: Checks if all pages are the same size. Instruction or cover pages at different sizes are flagged so you can exclude them from tiling.
Test square detection:Scans the first few pages for rectangles that match common test square sizes (1", 2", 1 cm, 5 cm). If found, tells you exactly what it should measure after printing.
Limitations
This tool checks the PDF file itself — it cannot check what your printer does to the file. The most common scale error (printing at 97% because of "fit to page") happens at print time, not in the PDF. Always verify with a physical measurement after printing.
Test square detection looks for simple rectangle shapes at standard sizes. Hand-drawn squares, squares with labels overlapping the edges, or squares drawn as four separate lines may not be detected.