Free image comparison tool
Compare two images
Pick the two pictures to compare and we tell you how closely they match. The comparison works on what the picture shows rather than on the file, so a cropped, resized, mirrored, recoloured or upscaled copy still comes back as a match. Answered in seconds, no account, and nothing you upload is stored.
Keep this as evidence
Get everything above, the verdict, the evidence metrics and the visuals, as a PDF report. We email it to you from reports@fjerne.com; nothing you uploaded is stored.
What the comparison gives you
A similarity score
How closely the two pictures match, as one number. It reads the content of the image rather than the bytes of the file, so two photos can score as the same work while sharing no file data at all.
A change map
Which parts of the picture came through unchanged and which were altered, painted directly over the image. This is usually the fastest way to see what someone did to a copy: a cropped edge, a removed signature, a shifted colour.
An aligned slider
Both pictures put into the same frame, with a handle to move between them. If one was rotated, mirrored or resized, it is straightened out first, so you are comparing like with like instead of guessing.
Comparing pictures: common questions
How do I compare two images?
Choose your original picture, choose the one you want to compare it with, and press compare. You get an answer in a few seconds: a similarity score, a change map showing which parts survived and which were altered, and a slider that puts the two pictures in the same frame so you can move between them. Nothing is installed and nothing is stored.
Can I compare two photos that are different sizes?
Yes. You can compare pictures of any size, and the comparison works on what the picture shows rather than on the file, so the two do not need to match in resolution, aspect ratio or format. One can be a phone screenshot and the other a full-resolution export, and they will still line up.
Can I compare pics taken on a phone?
Yes. A pic comparison works the same whether the file came off a phone, a camera, a screenshot or a download, and the two do not have to come from the same kind of device. Phone photos are usually the harder case, because they arrive resized and re-compressed by whatever app they passed through, and that is exactly the sort of change this is built to see past.
Will it still match a cropped or recoloured picture?
That is the point of it. Cropping, resizing, mirroring, rotating, recolouring, adding a filter, upscaling, re-saving as a different format: none of those reset the comparison. A file-hash check or a plain reverse image search only finds byte-identical re-uploads, which is almost never what you are actually looking at.
What does the image comparison score actually mean?
It is a measure of visual similarity between the two pictures, not a verdict. A high score means the two are visually the same work under some transformation. A low score means they are not. It does not tell you who made either one first, and it is not a legal finding.
Is this image comparison tool free?
Yes, free and with no account. There is no per-comparison charge and no trial that expires. If you want the comparison written up as a PDF you can keep, we email that to you for free too, and the address is used for that and nothing else unless you tick the box asking for more.
Do you keep the pictures I compare?
No. Both pictures are processed and discarded immediately. They are not stored, not used for training, and not shown to anyone. If you ask for the PDF report we keep the email address you gave us so we can send it, and that is all we hold.
Can I compare more than two pictures at once?
Not in this tool, which takes one pair at a time. If you have a whole catalogue of pictures to compare against a store you suspect, that is what the main Fjerne product does: it checks every product you have uploaded against the pages of a site in one pass, rather than making you feed it pairs.
Is this the same as reverse image search?
No. Reverse image search asks where else on the web a picture appears, and it answers well only for identical re-uploads. This asks a narrower question about two specific pictures you already have: are these the same image, and if so, what was changed. It answers that for altered copies, which is the case reverse image search tends to miss.
What this tells you, and what it does not
It measures visual similarity between two images. It does not establish that anyone copied anything, and it is not a legal finding or legal advice. We are not a law firm.
Your pictures are processed and immediately discarded, never stored. If you request the PDF report, we keep the email address you gave us so we can send it; that is all.
This compares one picture against one picture. Comparing two whole pages, text, layout and shared tracking IDs included, is the free website copy check instead. Checking a whole catalogue of your work against a store you suspect is what Fjerne itself does.