Free PDF transparency checker
Check live transparency in your PDF before print
Live transparency and blend modes look fine on screen and fail on some cutters, older RIPs, or spot-colour workflows. This free check flags transparency against a production profile — and runs the rest of the public preflight in the same pass.
- Live transparency reported when the public profile warns on it
- Clear next step: flatten in the design app or let Prepta flatten per profile
- Same report covers bleed, colour, fonts, resolution and PDF/X markers
- Honest: whether transparency is allowed depends on the destination workflow
Checking a file for someone else?
No account. One file at a time.
Runs the full free public preflight — not a single-rule toy.
Your file is deleted when the report is ready.
Free artwork check
IDLERelated tools and reading
Prefer the full overview? Use the free PDF preflight checker. Or read PDF transparency for print first, then come back and check a file.
- Print file checker
Check a JPG, PNG, TIFF, HEIC, PSD, AI, EPS, SVG or PDF for print — free.
- PDF bleed checker
Upload a PDF. Check bleed and trim against a real production profile — free.
- PDF CMYK checker
Check RGB vs CMYK in a PDF against a real print profile — free.
- PDF resolution checker
Check placed image DPI in a PDF against a print profile — free.
- PDF/X checker
Check PDF/X-4 markers in a PDF — free marker check for print workflows.
- PDF font checker
Check whether fonts are embedded for print — free Prepta Score.
Common questions
How do I check a PDF for transparency?
Upload it here. The free checker reports live transparency when the production profile cannot leave it as-is, along with the rest of the print-readiness findings.
Is transparency always a problem for print?
No. Modern PDF/X-4 workflows often allow it. Cutters, some large-format RIPs and older pipelines still need flattening. The profile decides.
Will this flatten my PDF?
No. The free check is diagnostic. Full Prepta can flatten when your production profile marks that repair as safe.
Why does Canva / design-tool export fail transparency?
Browser design tools often leave blend modes and opacity live. That is normal on screen and a common reason shops flatten before finishing.