Drop two images or two videos. You get the file fingerprint of each and the share of pixels that actually differ. Everything is calculated in your browser.
Files are not uploaded anywhere: the comparison runs on your device.
This page tells you whether two files are the same. Uniqueizer makes the variants: one master in, a batch of technically different files out — crop, colour, grain, speed, ratio and clean metadata, with a difference score for every file.
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Two things, because they answer different questions. The file fingerprint (a SHA-256 hash of every byte) tells you whether the two files are literally the same file. If the hashes match, uploading it twice gives you one creative in two places, not two creatives. The pixel comparison tells you how much the picture itself changed: both frames are brought to the same size and every pixel is compared.
The two can disagree. Re-saving a JPEG changes every byte and the hash, while the picture stays almost the same. That is the case the verdict calls "different files, practically the same picture".
| Result | What it means |
|---|---|
| Same fingerprint | One file. Any duplicate will behave as a copy of the original. |
| Different fingerprint, under 0.5% of pixels changed | Technically a new file, visually the same image — typical after re-saving or a metadata change. |
| Different fingerprint, a visible share of pixels changed | The frames really differ; the difference map shows where. |
The files never leave your device. The hash is calculated by the browser's built-in cryptography and the pixels are compared on a canvas in the page. You can open the page, switch off the internet and it will still work.
A short fingerprint calculated from every byte of a file. Change one byte and the hash changes completely; two files with the same hash are the same file.
Because the hash follows bytes, not pixels. Re-saving, different compression or removed metadata change the bytes even when the picture looks the same.
No. Everything runs in your browser; the page never sends the files to a server.
No. This is a technical comparison of files. Platforms review the content of ads under their own rules, and those rules apply to every variant.
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