PDF preflight checker for print
Use PDF Press to inspect print PDFs for fonts, color, images, page boxes, and production risks. It is built for prepress teams checking incoming files before imposition, with local browser processing and a live preview before export.
Direct answer
What is PDF preflight checker?
Source PDF inspection for print problems before production.
Preflight Inspector analyzes the loaded source PDF and opens a report with page boxes, fonts, color spaces, image resolution, hairline strokes, ink coverage estimates, and located issues. It is an inspection entry point, not a cleanup step: use it to decide what needs repair before imposition or export.
How to use Preflight Inspector
Upload files
Start with your source PDF or image files. Processing happens locally in the browser.
Add Preflight Inspector
Configure Summary, Fonts, Colors and any production settings that match the job.
Preview the result
Check page order, marks, scaling, and output geometry before committing the export.
Download output
Export the finished PDF for proofing, press, finishing, or another PDF Press step.
Best use cases
Key settings
Summary
Shows the overall verdict and the most important print-risk signals.
The summary groups findings into pass, review, and fail states so production staff can quickly see whether the source file is ready, needs manual review, or should be fixed before output.
Fonts
Lists detected fonts and flags embedding or substitution risks.
Missing or partially embedded fonts can change line breaks, glyph shapes, or output text. Use the font tab to decide whether the file needs to be re-exported or repaired before imposition.
Colors
Reviews color spaces, spot colors, and estimated ink coverage.
The inspector identifies RGB, CMYK, grayscale, and spot color usage and estimates total area coverage where possible. Use this before color conversion or proofing decisions.
Pages
Shows page boxes, dimensions, and page-scoped findings.
Compare MediaBox, TrimBox, BleedBox, and CropBox values before choosing imposition, bleed repair, or trim/crop operations.
Issues
Opens located findings in the issue rail and source preview.
Select an issue to jump to the affected source page. Export the marked proof when you need to hand off a review PDF or document what needs to be corrected.
Expert tip
Run preflight as the first step on every incoming file. Check for RGB images, missing fonts, low-resolution images, and transparency that needs flattening for older RIPs.
A passing preflight only means the file is technically compliant. It does not guarantee a good print. Always do a visual soft-proof after preflight.
Production recipes using Preflight Inspector
Saddle-Stitch Booklet
Standard saddle-stitched booklet. The most common short-run binding method.
Saddle-Stitch with Bleeds
Saddle-stitch booklet with synthetic bleed generation for artwork delivered without bleeds.
A5 Saddle-Stitch 2-Up on SRA3
Commercial A5 booklet workflow: impose on SRA4 flats, then repeat two copies on SRA3.
Perfect-Bound Book
PUR/hot-melt perfect binding for books with 48+ pages.
What print pros say
N-up imposition for labels and business cards is flawless. The grid snaps to my sheet, cut marks land where the guillotine needs them, and there's no more manual step-and-repeat.
Quite Imposing Plus is brilliant, but the licence never made sense for our volume. This covers what we actually used it for at a fraction of the friction.
I'd bounced between BookletCreator and Quite Imposing for years. PDF Press does booklet imposition and custom n-up layouts in one place, and it's the easiest prepress tool to teach.
Frequently asked questions
What is Preflight Inspector used for?
Source PDF inspection for print problems before production.
Who should use PDF preflight checker?
It is built for prepress teams checking incoming files before imposition. Common use cases include Prepress Validation, Source PDF Review, DPI and Font Checks, Color and Ink Review, Marked Proof Export.
Do my PDF files upload to a server?
No. PDF Press runs the PDF processing workflow in your browser, so your files stay on your device.
Can I use Preflight Inspector with other PDF Press tools?
Yes. You can combine it with other PDF Press tools in a multi-step workflow, then preview and export the final PDF.