How Print Shops Handle Low-Res Customer Files

By the Resly AI team · Updated 6 October 2026

The short answer

Check effective DPI at intake, not at the press: the file's pixels divided by the print size. If it falls short, ask for the original or a vector first, upscale photos to the print size if there isn't one, and vectorize logos that will be cut or embroidered. Proof the fix to the customer before printing, and charge for it as a file-prep fee instead of doing it for free.

Catch it at intake

Effective DPI is the file's pixels ÷ the print's inches. Check it when the order comes in, not when it's on the press.
Set thresholds by product: about 300 for photo prints and cards, 150 for posters and canvas, 100 for banners. The large-format guide has the viewing-distance numbers behind those.
Check the shape at the same time. A file that is the wrong shape gets cropped or gets white bars, and the customer rarely expects either.
Flag short files in the order so whoever is at the counter can raise it before the customer leaves.
Expect AI-generated files: square, about 1,024 pixels, often PNG with no camera details. They are low-res by design; see printing AI-generated images.

Choose the fix

Which fix to use for a low-res customer file
File	Fix
Photo saved from Facebook, a text or a screenshot	Fix: Ask for the original first; upscale if there is none
Old print brought in	Fix: Scan at 600 DPI, then upscale if printing larger
Logo for cut vinyl, embroidery or screen print	Fix: Vectorize
Logo for a printed banner or sign	Fix: Vector if one exists; otherwise upscale and proofread the text
Photo that is out of focus	Fix: A smaller size, or a different photo

Proof it, and charge for it

Upscaling redraws detail, and small text and faces are where it can drift. Email the customer a proof and print only on approval: it takes a minute, and it turns a remake into a reply.

Charge for it. A file-prep or image-enhancement line on the ticket is normal, and customers accept it when it comes with a proof. A fix you do for free every time is a cost you've decided to absorb.

Doing it at volume

Fixing files by hand a few times a week adds up. Resly Studio is built for it: upload a batch of up to 5 customer files, type the print size, and download print-ready files, either a PDF whose page is the print size or a JPG or PNG set to open at it. It extends the background to fit the shape in the same pass. Credits start at $0.50 an image, and the first 3 images are free with no card.

What it won't do: it delivers at most 16 megapixels, so it isn't the tool for a 10-foot banner at full resolution, and it isn't a vectorizer.

Try it on a customer file

Upload a file and type the print size. Pay per image, no account. For weekly volume, Resly Studio uses credits instead.

Drop images, or click to browseTap to choose photos

JPG, PNG, HEIC, WEBP (up to 50MB each) · up to 5 at once

From $1.99 · no account · nothing uploaded until you continue

Each extra image $1.99 $0.99 · up to 5 per order

Questions

What do print shops do with low-resolution files?

Check effective DPI at intake, ask the customer for the original or a vector, upscale photos or vectorize logos when there is none, and proof the fix before printing. Many charge a file-prep fee for the work.

Should a print shop charge to fix a customer image?

Yes. It is real work, and a file-prep or enhancement fee is normal. Customers accept it more readily when it comes with a proof showing the difference.

How do I tell a customer their file is too low resolution?

Tell them the size they ordered needs more detail than the file has, ask for the original or a vector, and offer to enhance it, with a proof, for a small fee. Being specific and offering a fix keeps the job.