What Trim Proof checks
- PDF exists and is downloadable
- MediaBox, TrimBox, and BleedBox
- PDF/X subtype
- Embedded fonts
- Placed raster DPI
- Ghostscript PDF/X conversion
PDF preflight checker for online print exports
Short answer
A PDF preflight checker should verify that the file is the expected size, has correct trim and bleed boxes, embeds fonts, uses the intended color workflow, and contains images at print resolution.
Use this page when a PDF looks fine on screen but needs structural print checks before a printer or client receives it.
PDF preflightpreflight PDF onlinecheck PDF for print
How the workflow runs
- 1Generate the proof
- 2Run the preflight gate
- 3Review passed and needs-attention checks
- 4Fix geometry, fonts, or images when needed
- 5Download the PDF only after the report is acceptable
What Trim Proof checks before delivery
The first proof checks PDF creation, MediaBox, TrimBox, BleedBox, PDF/X subtype, embedded fonts, and raster DPI. Paid production exports use the same gate before delivery.
Why automated preflight matters
A file can look fine on screen and still fail at print. Automated preflight catches structural PDF problems before a user pays for or sends the file.
Related print-ready tools
Print-Ready PDF GeneratorCreate print-ready PDF/X files with bleed, crop marks, CMYK output, embedded vector fonts, and preflight checks.PDF to CMYK ConverterConvert PDF color workflows toward CMYK with output-intent profiles and preflight checks for print production.Add Bleed to PDF OnlineAdd bleed, trim, safe-area guides, and crop marks to print files before export.
Common questions
Can preflight guarantee every printer will accept a file?
No software can guarantee every vendor-specific requirement, but preflight greatly reduces avoidable production failures.