What does “cropped” mean here?

A crop is a rectangular piece taken directly from another photo. This tool checks whether the pixels in one photo appear as a region inside the other.

Do my images leave my device?

No. The comparison happens in this browser tab. Nothing is uploaded or sent to a server.

How do I get the most reliable crop comparison?

For best results, compare originals or lightly compressed copies. Heavy edits, rotations, strong filters, screenshots, or resizing after the crop can make a match less reliable. Use the saved image files where possible: taking a screenshot or saving a photo again can change its pixels.

Why can a crop result be inconclusive?

Similarity alone does not confirm a crop. Edits, resizing, or several similar regions can make the result inconclusive. Repeating patterns, such as windows or leaves, can look alike in different parts of a photo. A similarity score describes the visual match; it is not proof that one image came from the other.

Does “no direct crop detected” mean the photos are unrelated?

No. It means the checker did not find a convincing direct rectangular crop. The photos might still share a source, especially if one has been edited, rotated, or heavily compressed. Compare better-quality copies if you have them, and treat the result as guidance.

Is resizing or converting an image the same as cropping?

Cropping removes part of the picture. Resizing changes its width and height, while converting changes how the file is stored. A smaller image can still show the entire original picture. The checker can flag a possible scaled copy or format conversion when the match covers the full image.

Which image formats can I compare?

The file picker accepts JPG/JPEG, PNG, WebP, GIF, and SVG. You can compare different formats, such as a JPG original and a WebP copy. The checker compares the picture your browser renders, so the files do not need matching extensions. For animation, use still images of the frames you want to compare; this tool does not compare an entire animation.

How do compression and transparency work?

Compression reduces file size. Lossless compression preserves pixels; lossy compression discards detail. Transparency lets the background show through. These choices affect appearance, file size, and how closely two copies match.

How are JPG, PNG, WebP, GIF, and SVG different?

JPG (or JPEG) suits photos, uses lossy compression, and has no transparency. PNG keeps pixels losslessly and supports transparency, making it useful for screenshots and graphics.

WebP supports lossy or lossless compression, transparency, and animation. It often makes smaller files than comparable JPGs or PNGs; its quality depends on export settings.

GIF supports animation and simple transparency, but its limited color palette can change photo colors. SVG usually describes shapes and lines rather than a grid of pixels, so it suits logos and diagrams that stay sharp when enlarged. Here, SVGs are rendered into pixels for comparison.

Should I convert my images before checking for a crop?

Usually, use the files you already have. Converting a blurry JPG to PNG cannot restore lost detail, and saving it as a lossy JPG or WebP again may remove more. File size alone does not tell you image quality: a small file may be efficiently compressed, have fewer pixels, or contain less detail.