Roblox Shirt Checker
A free Roblox clothing checker for shirts. Drop in a PNG or JPG, check its size and see-through faces, and see it on R6 and R15 avatars. No sign-up, and your file stays in your browser.
Drag to turn. The web preview is a guide; Roblox Studio shows the final look. Insert a Block Avatar rig, add a Shirt or Pants object, and select your uploaded image in ShirtTemplate or PantsTemplate. Official Studio testing guide. This preview does not simulate moderation or guarantee upload success.
What the checker looks at after you upload a PNG
Drop in a PNG or JPG that is 10 MB or smaller. The checker first confirms the file opens as an image, then runs two tests. The first is size. A classic Shirt is 585 pixels wide and 559 pixels tall, and any other size is marked wrong. The second is coverage. The checker splits the image into the 18 faces of the Shirt template, six for the torso and six for each arm, and measures how filled each one is. A face passes when at least 98% of its pixels are solid, which means an alpha value of 250 or higher. Empty space outside the faces is not counted. Your shirt is also shown on an R6 or R15 avatar that you can turn to look from every side.
Common failures and how to fix them
Wrong image size. The result says "Wrong image size" and the preview is stretched to fit. Export again from your editor at exactly 585 × 559 with no extra canvas, or rebuild the file in the Shirt Maker, which always exports at that size.
See-through torso front or back. These two 128 × 128 faces are marked as a problem because the avatar's skin shows through them. Paint them in and check again.
Another face is thin. Any other face below 98% filled gets a warning rather than a problem. A cut-out sleeve can be on purpose, so decide whether the hole belongs in your design.
File refused. Use a PNG or JPG under 10 MB. If the checker says the file could not be read as an image, export it again from your editor.
What the checker can't tell you
This checker is a quick look before you spend Robux, not a final ruling. It does not scan for art that crosses a seam. The Shirt Maker warns about that for art you place on the template, and here you can spin the avatar to look yourself. The preview does not show layered clothing, accessories, body scale sliders, experience lighting or Roblox's moderation, and it lights the avatar with plain white light instead of the light of a Roblox experience. R6 and R15 also place the shoulders differently, so check both. Before you upload, put the PNG on a dummy in Roblox Studio, in a bright scene and a dark one. Roblox Studio and the upload result have the final say. For Roblox's own rules, see the Roblox Creator Hub classic clothing docs.