Is my image really transparent?

Real transparency vs a fake checkerboard

When an image is genuinely transparent, it carries a hidden fourth channel — the alpha channel — that records how see-through each pixel is. Place it on any colour and the background shows through cleanly.

The grey-and-white checkerboard you see in editors like Photoshop or Canva is just how those programs draw “nothing here” on screen. The trouble starts when an image actually has those grey squares painted into it — no alpha channel at all. It looks transparent in a preview, but drop it onto a coloured website header or a printed flyer and the grey squares appear. This is extremely common with:

• AI image generators asked for a “transparent background” that flatten the editor’s checkerboard into the picture;
• screenshots of a transparent image taken inside an editor;
• JPGs, which can never be transparent — the format has no alpha channel.

Why AI images come with a fake checkerboard

Ask an AI image tool for a logo or sticker “on a transparent background” and you will often get a PNG with grey and white squares behind it. Most image models produce an ordinary picture with no alpha channel. They have seen thousands of images of the transparency checkerboard, so when you ask for transparency they draw what it looks like. In one benchmark of 23 image models by the design-software company img.ly, 20 scored zero on producing real transparency.

Whether the image came from ChatGPT, Gemini, Copilot, Midjourney, a stock site or a screenshot, the test is the same: check it here before it goes on your website, a T-shirt or a print job.

How this tool decides

We read every pixel in your browser. First we check for a real alpha channel — any fully or partly transparent pixels. If there are none, we look at the background for the tell-tale signature of a baked-in checkerboard: two near-neutral grey tones alternating in a regular grid. Then we show you the image on several solid colours so you can confirm with your own eyes.

How the fix works

When we find a painted checkerboard, Remove the checkerboard clears every patch of its two grey tones and softens the edge where it met your design, then gives you a new PNG with a real alpha channel. A sticker-style border in the same white or grey is usually recognised and kept when it is more than a few pixels wide; thinner outlines, and other white or grey parts of the design that touch the checkerboard, can be cleared with it. When the background is one plain colour, such as a logo on white, Remove the background clears that colour from the edges inwards, and, if you tick that option, from enclosed areas such as the inside of an O (white parts inside your design go too, so it's off unless you ask). Either way we check the result again and show it on the same colours, so you can see it worked before you download it. It works best on logos, icons, stickers and text. Hair, fur, glass and soft shadows need a proper background remover.

Checking without a tool

Two quick tests people use: zoom right in — if the grey squares get bigger as you zoom, they are pixels in the image, not your editor’s way of showing “nothing here”. Or place the image on a dark background, such as a dark slide or a black page; if you can still see squares, the background is fake. This tool does both for you, and counts the pixels.