Image Fingerprint Comparison
Image fingerprint comparison generates perceptual hashes to measure the visual similarity between two pictures. It allows you to check whether a photo or graphic has been reused, resized, lightly compressed, or modified.
Drag and drop, or
JPG, PNG, WebP, GIF (max 10 MB, 25 MP)
Drag and drop, or
JPG, PNG, WebP, GIF (max 10 MB, 25 MP)
Compares against 90°, 180°, 270° rotations and mirrored orientations.
Trims uniform solid borders (e.g. screenshot margins) up to 25% before comparison.
RepuKeel does not receive or store your images. All processing executes locally in your browser.
For your own images and content. Don't use this tool to identify or track people.
How to Use This Tool
- 1
Select Original Image
Choose or drag-and-drop your reference image into the first panel.
- 2
Select Comparison Image
Choose or drop the suspect or modified image into the second panel.
- 3
Choose Match Options
Enable orientation checks to test rotations and mirrors, or ignore solid border margins.
- 4
Review Similarity
Inspect the combined similarity percentage, perceptual hash breakdown, and copy the summary report.
What the Score Means
Likely the exact same picture resized, converted between formats, or lightly re-compressed.
Likely the same source image with minor cropping, color balance adjustments, or watermark overlays.
Shares general layout or luminance distribution, but has significant edits, heavy cropping, or different content.
Distinct images or substantial structural alterations that no longer match perceptually.
Limits & Scope
The tool works best when it is the same picture resized, saved with different compression, or lightly adjusted; it can miss heavy crops, collages, large overlays and heavy edits; a high score is a hint, not proof of copying; a low score does not prove the images are unrelated; this is not legal advice.
Frequently Asked Questions
How does perceptual fingerprinting differ from cryptographic hashes like MD5 or SHA-256?
Cryptographic hashes change completely if even one pixel or byte is modified. Perceptual image hashes (aHash, dHash, pHash) analyze visual structure and frequencies, allowing two differently compressed or resized versions of the same photo to match.
Are the images I compare uploaded to RepuKeel’s servers?
No. All pixel decoding and hash calculations execute locally in your browser. RepuKeel never receives, transmits, or stores your image files.
Can this tool prove copyright infringement?
No. A high similarity score serves as an investigative hint rather than legal proof. Factors like fair use, licensing, and creative transformation require legal review.
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Need to search the web for where an image appears online? Use the Reverse Image Launcher.
Looking to search by brand name, keywords, or text? Use the Search Query Builder.
Explore Targeted Removal Services
Found a copy of your image? Ask RepuKeel about next steps.
If you identified unauthorized use of your photos, logos, or creative assets, request a free analysis from our specialist removal team.
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