24 free online preflight tools

Check your files before print.

Measure image resolution, inspect PDF page sizes and plan bleed. Get a report that explains the result—and what still needs your printer’s approval. Processing stays in your browser.

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Start with:Image PPI PDF page sizes Sample files & results

Start a task

Check the production basics

Explore all 24 tools

Image DPI CheckerCheck whether an image has enough pixels to print cleanly.PDF Page Size CheckerCatch mixed or incorrect PDF page sizes before production.Print Bleed CalculatorTurn trim size into a press-ready canvas size.Pixels to Print Size CalculatorFind the largest clean print your image can make.

Browse by outcome

What do you need to finish?

Convert files

Convert PDF, DOCX, EPUB, TXT and image files. Each tool lists its supported direction and layout limits.

Inspect quality

Check page size, pixel dimensions, effective DPI and text layers.

Optimize output

Resize and compress files for print, web, marketplaces and email.

Plan for print

Calculate bleed, resolution, spine width, layouts and packaging.

Original test files

Know what a good result looks like.

Reproduce a 300 PPI image check, find the cropped page in a mixed-size PDF, and calculate a business-card bleed plan. Compare the exact inputs and expected outputs before using your own files.

Open the test bench →

Guides

Understand the result.

All field guides

PRINT PRODUCTION · NEW

What makes a PDF print-ready?

The concrete checks behind the buzzword: page boxes, bleed, fonts, resolution and PDF/X.

Read guide DOCUMENT CONVERSION · 9 MIN

Convert DOCX to PDF privately

What survives Word conversion, what changes, and what to inspect before sharing.

Read guide IMAGE RESOLUTION · 8 MIN

Check image DPI before printing

Use effective PPI and physical print size instead of unreliable metadata alone.

Read guide