Check a Classic Shirt file before testing
This Roblox Shirt checker opens a local PNG or JPG and evaluates it specifically as a Classic Shirt candidate. It reports decoded dimensions, basic shape classification, visible pixels, transparent pixels, partial alpha, and coverage. The type is locked to Shirt so the result cannot accidentally switch to Pants or T-shirt while you are reviewing a Shirt export.
The strongest automatic requirement checked here is the complete 585×559 canvas. Shirt and Pants share those outer dimensions, so a passing result does not prove that the internal rectangles use Shirt mapping. The checker provides technical evidence before the more important visual test in current official Roblox creation tools.
Why Shirt needs its own check
A Classic Shirt covers the torso and arms. Artwork is distributed across front, back, side, top, and bottom surfaces in an unfolded image. A file can look fragmented when viewed flat but align correctly after wrapping. Conversely, a normal illustration can look attractive as a rectangle while appearing broken on the avatar.
The Shirt workflow therefore asks different questions from a square T-shirt graphic. It must preserve the full canvas, keep torso and sleeve surfaces in the intended places, and maintain continuity where separated image edges meet on the model. This page keeps those requirements explicit.
Read decoded dimensions
The checker reads natural decoded width and height rather than trusting the filename. A file named shirt-585x559.png can still contain different dimensions. Renaming an extension or adding dimensions to a name never changes the image data.
An exact 585×559 result satisfies the outer canvas requirement used by the current Classic Shirt template. Any other size receives an error in the Shirt preset. Use the clothing resizer only when the source arrangement is already correct and resizing is truly the missing step. Scaling an ordinary image to 585×559 cannot invent Shirt panel mapping.
Understand visible coverage
Visible coverage is the percentage of pixels whose alpha is above zero. A fully opaque image approaches 100 percent, while a design with transparent unused areas reports less. Neither extreme is automatically correct.
Very low coverage may indicate that artwork was pasted onto a large canvas without reaching necessary Shirt surfaces. Very high coverage may be intentional fabric, but it can also mean a guide or temporary background was left in the export. Compare the flat preview against the intended design.
The checker counts visible pixels globally. It does not determine whether every required torso or arm rectangle contains useful content. Regional inspection remains necessary.
Inspect transparency and partial alpha
Transparent pixels expose underlying appearance. They may be intentional for cutouts or areas the design should not cover. Accidental holes can reveal the avatar body along sleeves, torso sides, or seams.
Partially transparent pixels often come from soft brushes, antialiasing, shadows, or background removal. They can create smooth artwork, but also pale or dark halos on different body colors. Review the Shirt on checker, light, and dark backgrounds using the clothing preview.
JPG does not normally preserve alpha. A JPG can pass dimensions while remaining fully opaque and containing compression noise. PNG is more predictable for template graphics, hard edges, and intentional transparency.
Shirt-specific visual checklist
After the technical report passes, inspect the torso front and back, both sides, shoulders, sleeve fronts and backs, arm sides, arm interiors, and cuffs. Look for patterns that stop abruptly, reversed text, mismatched colors, guide marks, and unintended clear pixels.
Pay special attention to seams. Two edges far apart in the flat template can become neighbors after wrapping. Repeating patterns, stripes, zippers, and borders make misalignment easy to see. Use an original current reference while editing rather than relying on memory.
The checker cannot know whether the file actually contains a Pants arrangement because the complete dimensions are identical. Keep Shirt and Pants sources in separate folders and use clear filenames.
Fix common Shirt failures
Wrong dimensions can be corrected with the local clothing resizer, but only if the mapped source remains intact. Choose nearest-neighbor sampling for hard pixel work and smoothing only for painted sources. Avoid repeated resizing.
Unexpected background color can be changed to transparency with the background remover. Repeated fabric colors can be adjusted with the color changer. Use conservative tolerance because one color may appear across multiple Shirt regions.
If placement itself is wrong, return to the Shirt maker or a full graphics editor. No size, alpha, or color utility can reconstruct template coordinates that were cropped away.
Studio testing remains required
Upload or test through current official Roblox tools and use an appropriate Block Avatar rig. Rotate the avatar under more than one angle and lighting condition. Check shoulder transitions, sleeve cuffs, inner arms, torso sides, back, and any transparent areas.
Technical checks reduce avoidable failures but cannot predict moderation, ownership review, creator eligibility, fees, or final visual acceptance. Platform requirements can change, so current Creator Hub information takes priority.
Local privacy and rights
The browser decodes the selected image, reads RGBA values, and draws the preview locally. It does not send the pixels to SkinEditor.org, request Roblox credentials, publish an asset, or store a database project. Refreshing the page removes the temporary report.
Only inspect and publish artwork you created or have permission to use. Passing the checker does not grant rights to logos, characters, photographs, patterns, or another creator’s Shirt. SkinEditor.org is independent and is not affiliated with Roblox Corporation.
Frequently asked questions
Can the checker distinguish Shirt from Pants automatically?
No. Both complete templates use 585×559. This page locks the intended workflow to Shirt, but internal mapping needs visual verification.
Does a pass guarantee upload acceptance?
No. It confirms local technical signals only. Official testing, moderation, rights, and current requirements remain separate.
Why does my Shirt have partial-alpha pixels?
Soft brushes, antialiasing, shadows, or background removal may create them. Inspect the edges on multiple backgrounds.
Is the file uploaded here?
No. Image decoding, pixel counts, and preview rendering happen locally in the browser.