← Print file preflight — free DPI and print-size checker
This tool vs. Printful
Two different shapes: Printful is account-based print-on-demand fulfillment for running a print storefront. This page is a free, private check of one file's resolution and filename before you upload it anywhere.
What each is for
Printful is a print-on-demand and warehousing company, founded in 2013, that lets a seller upload artwork, connect it to an online store — Shopify, Etsy, WooCommerce and others — and have each order printed and shipped only after a customer buys it, so the seller holds no inventory. It is used through a free account, with production and shipping charged per order rather than a flat subscription. Printful's own upload dashboard runs its own checks on a file after you submit it, and this page does not restate its current published resolution guidance or pricing, because printful.com is not reachable from this session to confirm today's exact wording: only its well-documented identity and category — print-on-demand fulfillment, connected to a seller's own storefront — are stated here.
This tool does none of what Printful does. It does not host a storefront, print anything, or ship anything. It reads a candidate file's pixel dimensions, format, byte size, and filename directly in your browser, checks the implied DPI at the print size named in the filename against a documented 150 DPI floor, ranks up to five candidate masters head-to-head at one target size, and exports a dated technical record — all before the file is ever uploaded anywhere. It runs free in any browser, keeps no account, and never transmits the artwork.
| Question | Where to answer it |
|---|---|
| I want to sell prints through a connected storefront, with fulfillment, shipping, and payment handled for me. | Printful, or a comparable print-on-demand service — running a store is not something this tool does. |
| Is this specific export sharp enough to print at the size I plan to sell it? | This tool's implied-DPI check, before you upload anywhere. |
| I have several exports of the same image and need to know which one to submit. | This tool's five-way ranked comparison. |
| I already got a low-resolution warning after uploading to a POD platform — could I have caught it sooner? | Yes: this tool checks the same kind of resolution problem before any upload, at no cost and with no account. |
| Do I need an account or a connected store to check a file? | This tool: no. Printful: yes, an account and a connected store. |
| Is my artwork sent anywhere to be checked? | This tool: no, it never leaves your device. Printful: yes — uploading the file is the point, since it is what gets printed. |
| What resolution do I actually need for a given print size? | This tool's own resolution walkthrough. |
Most artists get different value from each: Printful (or a comparable print-on-demand service) for running an actual storefront with fulfillment and shipping handled per order, and a private check like this one for an instant, no-account answer to whether one candidate file is sharp enough before any of it touches a platform. This page's own result is a resolution and filename check, not a colour proof, a print approval, or a substitute for whatever validation Printful or any other print-on-demand service runs on its own upload.
This tool needs no account and no sign-in: it is a static page, every check runs in your browser, and once it has loaded it keeps working with the connection off.
Common questions
Should I use this tool or Printful?
They do different jobs, and an artist selling prints will likely use both. Printful is a print-on-demand and warehousing company, founded in 2013, that lets a seller upload artwork, connect it to an online store (Shopify, Etsy, WooCommerce and others), and have each order printed and shipped only after a customer buys it — so the seller holds no inventory. It is used through a free account, with production and shipping charged per order. Printful's own upload dashboard runs its own checks on a file after you submit it, and its current published thresholds are not restated here because this session cannot reach printful.com to confirm today's exact wording. This tool does one narrower thing: it reads a candidate file's pixel dimensions, format, byte size, and filename in your own browser, checks the implied DPI at the print size named in the filename against a documented 150 DPI floor, ranks up to five candidates head-to-head, and exports a dated technical record — all before the file is ever uploaded anywhere. It runs free, keeps no account, and never transmits the artwork. An artist who wants to sell through a connected storefront with fulfillment, shipping, and payment handled for them is better served by Printful or a comparable print-on-demand service; an artist who wants to know, in seconds and before any upload, whether a specific export is sharp enough for a specific size is in the right place here.
Is this page affiliated with Printful?
No. This site is not affiliated with, endorsed by, or sponsored by Printful. Printful is a trademark of its owner, named here only to describe what this tool is and is not.
Open the free print file preflight to check your own file.