What you need to know about DPI
DPI is metadata — pixels don't change
Changing DPI only rewrites the embedded tag that tells printers how densely to place pixels. Your image's actual pixel count stays identical. A 3000×2000 image at 72 DPI is the same data as at 300 DPI — the printer just interprets it differently.
72 DPI vs 300 DPI for print
Screen images default to 72 or 96 DPI. Print shops require 300 DPI minimum. If your pixel dimensions are large enough, simply changing the DPI tag to 300 makes the file print-ready without any quality loss.
Will my image look blurry after printing?
Check the print size table above. If your image at 300 DPI prints smaller than your intended paper size, it means you don't have enough pixels — no DPI change will fix that. You'd need a higher-resolution original.
Which format for print?
Use PNG for lossless quality when sending to print labs. Use JPG at 90–100% quality for most commercial printers. WebP is great for web but some print software doesn't support it yet.