Check artwork in your browser and see what may go wrong in print and how to fix it.
Choose an image to see its print risks.
Next: DPI and max size at 30 cm—Waiting for a local image
A preflight hint, not production approval. Pass means this check found no risk in this analysis.
Common practices and supplier advice, not universal standards. Follow the product template and approve a physical sample.
| Check | DTF | DTG | Sublimation | Embroidery |
|---|---|---|---|---|
| Resolution | 300 PPI is a common target; follow the template | Printful advises at least 150 PPI; 300 for more detail | Printful: 150 PPI for broad shapes, 300 for text/detail | Pixels are a starting point; embroidery needs digitizing |
| Semi-transparency | White ink may cause pale edges or patches; solid colors or halftones are common fixes | The underbase on dark garments can change faded effects too | Gradients commonly work on light polyester; transparency is not white ink | Standard thread embroidery uses shapes or digitized textures |
| Thin lines / small text | Defaults here reference DTF Direct: 0.5 mm lines, 1 mm details | Ink spread, fabric and pretreatment affect detail; sample first | Heat transfer can soften detail; inspect at final size | Usually thicken and simplify; DTF thresholds do not carry over |
| Colors | Full color, with gamut limits | Full-color photos, with gamut limits | Full-color gradients; fabric affects color | Standard embroidery uses supplier thread colors; gradients need revision or a special process |
| Fabric | Cotton and synthetics need compatible film, adhesive and press settings | Cotton is common; absorbency and surface affect detail | Light polyester is common for apparel; do not reuse unchanged on dark fabric | Check fabric, backing, placement and stitch conditions |
| Check | Print risk and fix |
|---|---|
| Resolution | PPI uses the final width of the whole canvas: ≥300 passes, 150–300 needs review, below 150 is a problem. These are the DPI tool’s advisory bands, not a standard. A DPI tag change adds no detail. |
| Semi-transparency | Count visible pixels with 0 < alpha < 255. Edge-only transparency needs review; interior transparency is marked as a problem. Normal antialiasing can trigger this too. Inspect the overlay before revising. |
| Thin lines and dots | Estimate the thinnest area of the alpha ≥128 mask. Below your line limit is a problem: lines may break or hold too little powder. Thicken and sample. Internal strokes on an opaque background are not detected. |
| Possible small text or details | Connected-region height flags small elements for review. These can be parts of letters, dots or noise, not recognized text, font size or a readability test. |
| Transparent margins and canvas | Transparent margins make the artwork smaller than the canvas size ordered. Trimming while keeping artwork size differs from trimming and enlarging to the old width. Opaque backgrounds also get a review warning. |
| Garment contrast | Estimate visible pixels whose screen composite is close to the garment color. Any such region needs review. Change the base or outline and check a physical sample. |
Synthetic example: a 4 × 4 px canvas contains a centered 2 × 2 px square with alpha=128 and transparent surroundings. At 0.04 cm canvas width: 254 PPI, 4 visible pixels, 100% semi-transparent, 25% bounding-box area, artwork width 0.02 cm. Crop and enlarge to 0.04 cm and resolution becomes 127 PPI.
Line example: only the middle column of a 5 × 5 px image is opaque. At 0.05 cm width each pixel is 0.1 mm. Estimated line width is 0.1 mm, below the default 0.5 mm. The connected region is 0.5 mm tall, below the default 1 mm detail height.
Practical example: 3600 × 4800 px printed at 30 × 40 cm gives 304.8 PPI. Artwork occupying half the canvas width prints 15 cm wide. Crop and enlarge it to 30 cm and resolution falls to 152.4 PPI.
Sources checked: 2026-10-22
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No. Antialiased edges are also semi-transparent, and a transparent PNG is not inherently a problem. Inspect the distribution and overlay. Broad shadows and soft fades need underbase review; do not remove normal details just to silence a warning.
It warns when there is no transparency but cannot distinguish a white background from intentional white artwork or recognize text. Line and element checks use the alpha mask, not color segmentation inside an opaque photo.
The longest edge is reduced to 1200 px and analyzed in a background worker. Nearest-neighbor sampling may miss lines or dots; the result reports sampling scale. Decoding still uses device memory. Crop unnecessary space in an editor if the file is too large.
This release only checks and highlights areas. It does not change the original. Thicken lines, crop, remove backgrounds or make halftones in an editor, then check again at the final print size.
No. Color profiles, white-ink choke, powder, press settings, text readability and fabric behavior are not verified. Confirm the size, process and results with your supplier and order a sample.
2026-10-22: First release with local pixel checks, issue overlays and cross-process guidance.