Image Hash Calculator
Generate perceptual hashes to find duplicate or similar images. Compare two images to check similarity.
Upload Image to Calculate Hash
Drag & drop an image here, or click to select
Generating hash...
First Image
Click to upload
Second Image
Click to upload
Image Hash Values
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Image 1
Image 2
pHash Similarity
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dHash Similarity
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aHash Similarity
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// Frequently Asked Questions
What is a perceptual hash?
A perceptual hash (pHash) is a fingerprint based on image appearance, not exact pixels. Similar-looking images have similar hashes, making it useful for finding duplicates even after resizing or minor edits.
What do the different hash types mean?
pHash: Best for photos, robust to minor changes. dHash: Fast, good for gradient detection. aHash: Simple average-based, good for quick comparisons.
How accurate is the similarity detection?
90%+ similarity usually means identical or near-identical images. 75-90% suggests similar images with minor differences. Below 75% typically means different images.