How to Send Us Artwork That Actually Prints Well

Almost every printing disappointment traces back to the file, not the printer. Here's what makes a file work at large sizes, and what to do if yours isn't ideal — because usually there's something we can do.

Resolution is about size, not megapixels

An image doesn't have a resolution on its own. It has a pixel count, and a resolution only exists once you decide how big to print it.

A 3000-pixel-wide photo is 300 DPI at ten inches wide, 125 DPI at two feet, and 25 DPI at ten feet. Same file, three completely different outcomes.

Below about 100 DPI at the size you've ordered, we'll get in touch before printing anything. That's our threshold. Above it, large-format work holds up well — you're viewing a banner from several feet away, not with your nose against it, so banners tolerate far lower resolution than a business card would.

To check your own file: divide the pixel width by the printed width in inches. A 2400-pixel image on a 4-foot (48-inch) banner is 50 DPI. That will look soft.

Where low-resolution files come from

Four culprits, in order of how often we see them:

Screenshots. A screenshot is only ever as big as your screen. Screenshotting a photo throws away most of the original, and the original is still on your phone.

Images saved from Facebook or Instagram. Social platforms compress hard on upload. What you download back is a shadow of what you posted. Find the original.

Images pulled from a website. Web images are deliberately small so pages load fast. A logo copied from a company's website is usually 200 pixels wide and unusable at size.

Photos sent through messaging apps. Most messaging apps compress by default. If you're sending us a photo, email it, or use the uploader on the product page.

The pattern: go back to the original. The camera roll version, the file the designer sent you, the logo file in the email from whoever made it. It's nearly always still somewhere.

Logos are a special case

If you have your logo as an AI, EPS, SVG or PDF file, send that one. These are vector files — they're mathematical descriptions of shapes rather than grids of pixels, so they scale to any size with no quality loss at all. A vector logo is as sharp on a ten-foot banner as on a business card.

If all you have is a JPG or PNG, send the largest version you can find. If it's small and the logo is simple, ask us — redrawing a straightforward logo as vector is often quick.

Colour will shift a little, and that's physics

Your screen makes colour with light (RGB). We make it with ink (CMYK). The two don't map onto each other perfectly, and no printer anywhere fully closes that gap.

In practice: bright, saturated blues, greens and oranges are the ones that shift most — they can look slightly duller in print than on a backlit screen. Blacks, whites, greys and most brand colours come out very close.

Your approved proof is the colour reference. Small variation between screen and print isn't a fault and isn't grounds for a reprint, which is worth knowing up front. If exact colour matching matters — matching an existing sign, or a brand colour you're held to — tell us before you order and give us the specific colour reference.

What we'll do if the file is a problem

We won't quietly print something we know will look bad. If your artwork is too low-resolution for the size you've ordered, we'll email you before it goes near the printer, and usually we'll offer options: a higher-resolution version if you can find one, a smaller size at the same quality, a redraw, or recreating the piece from scratch.

Sometimes we can make a marginal file work — cleaning it up, upscaling carefully, or rebuilding the text portion so at least the words are crisp. Text is the thing that most obviously looks wrong at low resolution, and text is the easiest thing for us to rebuild.

Two ways to send it

There are two upload paths on the site, and they're not the same thing:

"I already have a design" — for a finished, print-ready file you want printed as it is. If you upload here and confirm the file is final, we can print it as supplied without a proof, and you own the content, spelling and dimensions.

The designer's image uploader — for photos and logos you want us to place into a layout. Anything that goes through here, we design around, and you get a proof to approve.

If you're unsure, use the designer. Anything we've had a hand in gets a proof by default.

The proof

Every order we design gets a free digital proof, normally emailed within 24 hours. Check it properly:

• Every word, especially names
• Every date — and check the day of the week is real
• Phone numbers and web addresses, digit by digit
• That nothing important sits too close to the edge

Nothing prints until you approve it, and changes before approval are free and unlimited. The production clock starts when you approve, not when you order — so a same-day approval is the single biggest thing you control about how fast your order arrives.

Once you've approved, we print what you approved. A typo you signed off isn't something we can refund, which is precisely why we'd rather you took an extra ten minutes over it.

Questions about a file before you order? Email it to hello@miracleprints4u.com and we'll tell you honestly whether it'll work.