A great DTF transfer starts with a great file. DTF printers print exactly what's in your artwork, so a few minutes of file prep is the difference between a crisp, vibrant print and a blurry one with a white box around it. Here's everything your file needs, plus the most common mistakes we see and how to fix them.
DTF file requirements at a glance
- File type: PNG (preferred) or PDF
- Background: transparent, with no white box around the design
- Resolution: 300 DPI at the size you want printed
- Color mode: RGB
- Orientation: not mirrored. Upload the design the way it should read on the shirt
- Gang sheets: 22" wide, with at least 0.25" between designs
What file type is best for DTF transfers?
A PNG with a transparent background is the best choice. PNG keeps transparency and doesn't lose detail when you save it. We also accept PDF files. Avoid JPG: it can't hold a transparent background, so whatever color sits behind your design prints too.
If your logo is a vector file (AI, EPS or SVG), export it as a PNG at the size you want printed, or save it as a PDF.
Why does the background need to be transparent?
DTF prints every pixel in your file, including a white or colored background. If your design sits on a white rectangle, you'll get a white rectangle on the shirt, and it's most noticeable on dark garments.
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How to remove a background:
- Canva: download as PNG and check "Transparent background" (a Canva Pro feature).
- Photoshop: delete or hide the background layer, then export as PNG.
- Illustrator: export as PNG with the background set to Transparent.
- Free online tools: background removers work well on simple designs. Zoom in afterward to check the edges.
Also watch out for semi-transparent effects like soft drop shadows, glows and faded edges. DTF prints a white layer under your colors, so very faint or partly see-through areas may not print the way they look on screen. Crisp edges and solid colors give the cleanest result.
What resolution (DPI) do DTF transfers need?
Your file should be 300 DPI at the size you want printed. In plain terms, that's 300 pixels for every inch of the print. Use this chart to check your file:
| Print size (longest side) | Pixels needed (longest side) |
|---|---|
| 2" | 600 pixels |
| 4" | 1,200 pixels |
| 6" | 1,800 pixels |
| 8" | 2,400 pixels |
| 10" | 3,000 pixels |
| 12" | 3,600 pixels |
| 22" (gang sheet width) | 6,600 pixels |
To see a file's size in pixels, open its details on your computer (Properties on Windows, Get Info on a Mac).
Making a small image bigger doesn't add detail. Screenshots, logos saved from websites and images downloaded from social media are usually too small for a sharp print, so start from the original or largest file you have.
How do I size my design?
For transfers by size, the size you choose is the longest side of your design. A 4" transfer is 4" on its widest or tallest side, and the other side scales to keep your proportions. Trim any empty transparent space around the design before you upload, so the artwork itself fills the size you order.
Not sure which size to pick? These are popular choices:
| Size | Common uses |
|---|---|
| 2" | Inside-neck labels and small tags |
| 3"–4" | Hats, sleeves, left chest and back neck |
| 5"–7" | Toddler shirts, tote bags, aprons and small backpacks |
| 8"–9" | Youth shirt fronts and tote bags |
| 10"–11" | Adult shirt fronts |
| 12" | Full back prints on adult shirts |
Color, fine lines and small text
- Use RGB color mode, the default in most design apps. Screens and ink are different, so very bright and neon colors can print slightly differently from how they look on your monitor.
- Keep thin lines and small text readable. DTF holds fine detail well, but hairline strokes and tiny text can break up. As a rule of thumb, avoid lines thinner than about 1 pt.
- Zoom in and clean up stray pixels. Tiny specks and leftover bits of background are easy to miss on screen, but they'll print.
Preparing a gang sheet
Using our Gang Sheet Builder? Upload each design as its own transparent PNG and arrange them right in the builder. If you're making a sheet in another program:
- Set the canvas to 22" wide, anywhere from 12" to 504" long
- Use 300 DPI (6,600 pixels wide) and a transparent background
- Leave at least 0.25" between designs so they're easy to cut apart
- Export as a PNG and upload it in the builder, which detects the size and price automatically
Our gang sheet guide has more tips for fitting extra designs on every foot.
Common DTF file mistakes (and how to fix them)
| Problem | Fix |
|---|---|
| White box around the design | Remove the background and save as a transparent PNG. |
| Blurry or pixelated print | Use a file that is 300 DPI at the full print size (see the pixel chart above). |
| Design prints smaller than expected | Trim the empty space around your artwork. The size you order is the longest side. |
| Text reads backwards | Don't mirror your file. Upload it exactly as it should look on the shirt. |
| Faded shadows or glow effects | Swap soft, see-through effects for solid colors. |
| Small specks on the transfer | Zoom in and erase stray pixels before you upload. |
Not sure about your file? We'll check it for free
Every file gets a free artwork check, and you're welcome to email your artwork to info@gravity-designs.com before you order. We'll let you know if anything needs fixing. Reprints and refunds cover printing issues on our side, but not problems with the uploaded file or the size ordered, so a quick check up front can save you a reorder.
Next step: once your transfers arrive, follow our heat press guide for the exact settings. More questions? Our DTF FAQ page covers shipping, turnaround and more.
Ready to print? Build a gang sheet or order transfers by size. Orders placed by 3 PM ET, Monday–Friday, are printed the same day, with free shipping on orders of $99 or more and local pickup in Coral Springs, FL.
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