The perfection of photoshopped images are such that you may not be able to tell if the images is modified or not. How do you check for photoshopped images? Is there any online service to check if the image is photoshopped or real? Sometimes you may want to check the authenticity of images for some reason. Many of the images posted online might be modified using any tools like Adobe Photoshop, but this cannot be found out just by viewing the image or checking its properties.
FotoForensics is a free and excellent web service that helps you to determine if a picture or image is real or computer graphics, if it was modified. The Even you can see how it was modified.
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FotoForensics uses Error Level Analysis (ELA) algorithm. ELA algorithm evaluates the error level potential of a JPEG image. Being a lossy image format every resave degrades the picture. When a picture is modified, the changed parts have a higher error level potential than the rest of the image.
You can upload your images to FotoForensics to check whether it is modified or original. The service supports JPEG or PNG picture for Error Level Analysis. The maximum allowed size of the image is 5 MB and the pictures should also be at least 100×100 pixels.
See the sample results from FotoForensics below.check-if-photoshopped-online

Image source FotoForensics
When you submit an image, you will get a direct link that you can share with other people. The pictures will be removed after 3 months of inactivity.
You can read the FotoForensics FAQ here

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