PDF Print Box Inspector

Check page dimensions and declared MediaBox, CropBox, TrimBox, and BleedBox values before sending a PDF to a printer. The selected file is read locally in your browser and is not uploaded to BigBears.

Choose a PDF to begin.

What this MVP checks

  • PDF readability and page count through PDF.js
  • Rendered page dimensions
  • Declared MediaBox, CropBox, TrimBox, and BleedBox arrays found in the PDF source
  • Expected trim-size comparison with a small rounding tolerance

Important limits

This is not a replacement for Adobe Acrobat Preflight or a print provider’s own workflow. It does not yet prove CMYK/spot-color correctness, image effective PPI, overprint behavior, transparency flattening, font embedding completeness, or PDF/X compliance. Always follow the printer’s specification and inspect a proof before production.

File privacy: PDF bytes are analyzed locally. PDF.js is loaded from a pinned public CDN; ordinary site analytics and advertising may still load, but this tool does not include PDF contents in those requests.