DTF File Readiness Checker — Stop Getting Your Files Rejected
Getting your file rejected by a DTF supplier is frustrating and wastes time. Most rejections come down to the same small set of issues: wrong color mode, wrong DPI, or a colored background that should be transparent.
This tool checks your file details against the DTF industry file standards used by suppliers worldwide. Enter your file specifications and get a pass/fail result for every requirement, with exact fix instructions for anything that fails.
The most common reasons DTF files get rejected
Wrong color mode is the #1 cause of color shift — if your file is in CMYK, colors will look different when printed. Low DPI (below 300) produces blurry output especially on larger designs. White or colored background will print as a solid rectangle around your design on the garment — this is very common for people who design in Canva and forget to remove the background before downloading.
Quick checklist before every submission
PNG format · RGB color mode · 300 DPI · Transparent background · Canvas at exact print size · No Pantone/spot colors · Under 100MB. If all of these pass, your file is ready to send to any DTF supplier.
Frequently Asked Questions
My supplier said my file is "wrong DPI" — what does that mean?
DPI (dots per inch) is the resolution of your file. DTF suppliers require a minimum of 300 DPI for sharp output. If you designed in Canva at default settings, your file might be 96 DPI — which will print blurry. You need to recreate the design at 300 DPI, or in Canva use Custom Size and set the dimensions in pixels (width in cm ÷ 2.54 × 300 = pixel width).
What does transparent background mean for DTF?
Transparent background means the area around your design has no fill — it shows as a grey/white checkerboard pattern in Photoshop or Canva. When this file is printed as a DTF transfer, only the design transfers to the garment. If your background is white or colored, that entire area will print as solid color on the garment.
Why does my supplier want RGB and not CMYK?
DTF printing uses RGB-based inks. If you submit a CMYK file, the supplier's software converts it to RGB during processing — and this conversion causes color shift. Blues may turn purple, reds may turn orange. Always design in RGB from the start to get accurate color output.
What is the correct pixel size for a 30×30cm DTF transfer at 300 DPI?
The formula is: size in cm ÷ 2.54 × 300 = pixels. So 30cm ÷ 2.54 × 300 = 3543 pixels. Your canvas should be 3543×3543 pixels for a 30×30cm print at 300 DPI.