PDF DPI Checker & 300 DPI Converter (Free Online)
Inspect your PDF resolution and convert all pages into high-definition 300 DPI for Amazon KDP book covers, manuscripts, and commercial print shops.
Upload book manuscript, cover, poster, or thesis PDF to check DPI
Why 300 DPI Matters for Printing & Publishing
Understanding Dots Per Inch (DPI) to prevent rejected print submissions.
Amazon KDP Rule
Amazon Kindle Direct Publishing strictly requires book cover PDFs and interior graphics to meet 300 DPI to avoid blurry physical printing.
72 DPI vs 300 DPI
Computer screens display content at 72 or 96 DPI, which looks fine digitally but prints pixelated. 300 DPI quadruples the density for razor-sharp ink droplets.
Commercial Print Shops
Offset printers and online shops like Vistaprint flag any document under 300 DPI as a preflight error. Our tool fixes this in 1 click.
Frequently asked questions
- How do I check if my PDF is 300 DPI?
- Upload your PDF to SolveMyPDF's free DPI Checker. The tool instantly calculates the trim size in inches/mm, pixel dimensions, and effective DPI. If the document is under 300 DPI, you can convert it in one click.
- Why does Amazon KDP require 300 DPI for book covers and interiors?
- Amazon Kindle Direct Publishing (KDP) enforces a 300 DPI minimum standard to ensure printed books do not suffer from pixelated text or blurry graphics when printed on high-speed industrial presses.
- Can I convert a PDF to 600 DPI for fine art or architectural prints?
- Yes. SolveMyPDF offers 150 DPI (screen/web), 300 DPI (standard print/KDP), and 600 DPI (ultra high definition) export modes.
This tool produces a formatted template from the details you enter. It is not legal, tax, or medical advice — see our Terms of Service. Requirements vary by jurisdiction and change over time, so have anything consequential checked by a qualified professional.