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Professional pixel-level image analysis powered by WebAssembly algorithms. Features PSNR calculations, euclidean distance comparison, and thermal difference heatmaps for precise design verification and quality assurance.
All image processing happens locally in your browser. Your images never leave your device, ensuring complete privacy and security for your visual assets.
All processing happens locally in your browser. Your photos never leave your device, ensuring complete security for confidential design work and sensitive visual assets.
Select two photos you want to analyze side-by-side
Execute WebAssembly-powered algorithms for precise pixel comparison and thermal heatmap generation
Review PSNR scores, similarity percentages, and euclidean distance calculations
Drag the slider to instantly reveal differences between photos with smooth transitions
Analyze file properties, dimensions, aspect ratios, and timestamps in a detailed table
Clear visual analysis with synchronized photo positioning and hover effects
High-performance pixel comparison using RGBA euclidean distance calculations and adaptive threshold detection
Generate visual difference heatmaps with intensity-based coloring and exportable PNG format
All processing happens locally - your photos never leave your device
Computes pixel-level differences using 4-channel RGBA euclidean distance:
√((R₁-R₂)² + (G₁-G₂)² + (B₁-B₂)² + (A₁-A₂)²)Peak Signal-to-Noise Ratio calculation for image quality assessment:
PSNR = 20 × log₁₀(255 / √MSE)Creates intensity-based visual difference maps with adaptive coloring:
intensity = min(normalizedDiff × 2, 1)Analyze mockups against actual implementations to ensure pixel-perfect accuracy
Track visual changes between different versions of your designs or screenshots
Detect rendering issues, layout shifts, or unintended visual changes
Our WebAssembly engine performs euclidean distance calculations on every pixel's RGBA channels. The algorithm computes similarity percentages, PSNR scores, and generates thermal heatmaps to visualize differences with scientific precision.
Beyond basic metadata, we calculate advanced metrics including similarity percentages, Peak Signal-to-Noise Ratio (PSNR), Mean Square Error (MSE), difference pixel counts, and processing time statistics for comprehensive quality assessment.
Our algorithm automatically detects size mismatches and applies Lanczos3 resampling to align images for accurate pixel-level comparison. This ensures precise analysis regardless of resolution differences while maintaining image quality.
Absolutely! All photo processing happens entirely in your browser. Your photos are never uploaded to our servers, ensuring complete privacy and security for sensitive visual content.
Our tool supports all major photo formats including JPG, PNG, WebP, GIF, and more. Maximum file size is 10MB per file for optimal performance.
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