File Preflight field guides
Better files start
with better decisions.
Practical, production-minded explanations for the choices behind image, PDF and print preparation.
Image Resolution for Printing
Understand PPI, DPI, print dimensions and sensible targets for photos, posters and large-format graphics.
Read field guide ↗IMAGE PREFLIGHT · 12 MIN READHow to Check DPI of an Image: Free Online Method
Check an image's DPI and effective PPI online without Photoshop, then verify whether its pixel dimensions are suitable for the intended print size.
Read field guide ↗LARGE FORMAT · 9 MIN READ150 PPI vs 300 PPI for Posters and Large Prints
Choose a sensible poster resolution using print size, viewing distance, source quality and printer requirements instead of a universal 300 PPI rule.
Read field guide ↗PRINT PRODUCTION · 5 MIN READHow to Set Up Print Bleed for Cards, Flyers and Packaging
Plan flat and folded artwork, calculate exact bleed dimensions, keep safety separate and check your exported PDF against the supplier template.
Read field guide ↗PDF PREFLIGHT · 8 MIN READHow to Prepare a PDF for Commercial Printing
Use a practical PDF preflight checklist covering page size, bleed, fonts, images, color, page order and final proofing.
Read field guide ↗IMAGE FORMATS · 9 MIN READJPG vs PNG vs WebP for Etsy Images and Printables
Compare JPG, PNG and WebP for listing photos, transparent artwork, downloadable printables and web previews.
Read field guide ↗BOOK PRODUCTION · 12 MIN READHow to Calculate Paperback Spine Width and Cover Spread
Estimate paperback spine width from page count and paper caliper, then build a full cover spread without scaling the printer's template.
Read field guide ↗PRINT PREFLIGHT · 8 MIN READOnline Print Preflight Checklist: 14 Checks Before Upload
Use a practical online print preflight checklist to review page size, bleed, fonts, images, color and final PDF output before sending artwork.
Read field guide ↗PACKAGING · 12 MIN READHow to Calculate Box Volume and Dimensional Weight
Measure a box correctly, calculate litres or cubic feet, and understand why carrier dimensional weight uses external dimensions rather than internal capacity.
Read field guide ↗PDF CONVERSION · 9 MIN READHow to Convert PDF Pages to JPG or PNG Without Uploading
Choose JPG or PNG, select a useful rendering resolution, and convert PDF pages to images locally without sending the source document to a server.
Read field guide ↗PDF TEXT · 9 MIN READExtract Text from PDF vs OCR: Which Method Do You Need?
Identify whether a PDF already has selectable text, understand when OCR is required, and extract a private TXT copy without uploading the document.
Read field guide ↗EBOOK CONVERSION · 8 MIN READHow to Convert EPUB to PDF for Reading or Printing
Understand reflowable EPUB and fixed PDF layouts, convert authorized books privately, and choose page settings that produce a readable print copy.
Read field guide ↗DOCUMENT CONVERSION · 13 MIN READHow to Convert DOCX to PDF Without Uploading the Document
Choose the right DOCX-to-PDF method, understand what can move during conversion, and inspect page breaks, fonts, tables and images before sharing the PDF.
Read field guide ↗EBOOK CONVERSION · 12 MIN READHow to Convert PDF to EPUB for Better E-reader Reflow
Determine whether a PDF has usable text, understand reading-order limits, create reflowable EPUB metadata and verify the converted book on an e-reader.
Read field guide ↗IMAGE RESOLUTION · 9 MIN READHow Many Pixels Do I Need? Print Size Charts From 4×6 to 24×36
Calculate exact pixel dimensions for common print sizes at 300 and 150 PPI, understand megapixel requirements, and learn how to handle insufficient image resolution.
Read field guide ↗FILE FORMATS · 9 MIN READRaster vs Vector: Choosing File Types for Logos, Text and Photos
Understand the fundamental difference between raster (pixel-based) and vector (path-based) files, when to use each, and how they affect print quality and scalability.
Read field guide ↗PRINT PRODUCTION · 7 MIN READWhat Is a Print-Ready PDF? The Checks That Matter
Check page boxes, bleed, fonts, effective resolution and color against your printer's requirements, with worked examples and clear tool limitations.
Read field guide ↗COLOR · 9 MIN READCMYK vs RGB for Print: Which Color Mode to Send
Understand the difference between additive RGB and subtractive CMYK color models, when to convert colors, and practical export settings for different printing processes.
Read field guide ↗PRINT PRODUCTION · 5 MIN READBleed and Safety Margins: 3 mm vs 0.125 in Explained
Compare 3 mm and 0.125 in bleed with exact conversions, A5 pixel calculations and a supplier-first checklist for safe margins.
Read field guide ↗COLOR · 13 MIN READOverprint vs Knockout: Ink Interactions Every Designer Should Check
Understand the difference between knockout and overprint, when to use each, and how to avoid common printing disasters caused by incorrect ink interactions.
Read field guide ↗PAPER & SIZES · 12 MIN READPaper Sizes Explained: A Series vs US Letter, Legal and Tabloid
Understand ISO A-series paper sizes, US letter and legal formats, and how to choose the right paper size for your printing needs.
Read field guide ↗PAPER & SIZES · 8 MIN READPaper Weight Explained: GSM, Pounds and What to Order
Understand paper weight measurements, convert between GSM and pounds, and choose the right paper for your printing needs with confidence.
Read field guide ↗PAPER & SIZES · 8 MIN READEnvelope Sizes and Postal Aspect Ratios: C Series, DL and US
Understand ISO envelope standards, common US sizes, postal aspect ratio requirements, and how to choose the right envelope for your mailing needs.
Read field guide ↗PACKAGING · 8 MIN READBarcode Quiet Zones and Label Safe Areas: Getting Scans Right
Learn what quiet zones are, why they matter for barcode scanning, and how to design labels that scan reliably every time.
Read field guide ↗BOOK PRODUCTION · 6 MIN READKDP Paperback Covers: Templates, Spine Width and Bleed
Learn how to create KDP paperback covers with proper spine width calculation, bleed, and safe zones using Amazon's official templates.
Read field guide ↗BOOK PRODUCTION · 8 MIN READFrom Word Count to Page Count: Planning a Book Interior
Learn how to estimate book page count from word count, understand the factors that affect pagination, and plan your book layout effectively.
Read field guide ↗PDF WORKFLOWS · 11 MIN READWhy Is My PDF So Big? Fonts, Images and Safe Fixes
Understand what makes PDFs large and apply safe, private methods to reduce file size without losing quality or breaking features.
Read field guide ↗PDF WORKFLOWS · 10 MIN READHow to Merge, Split and Reorder PDFs Without Uploading
Learn the right tools and safe order for merging, splitting, reordering, rotating and deleting PDF pages privately in your browser.
Read field guide ↗SELLING PRINTABLES · 12 MIN READHow to Make and Sell Etsy Printables: A File-First Workflow
Learn the essential file preparation steps for creating professional Etsy printables that customers can download and print successfully.
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