Pad photos to exact 1:1, 4:5, or 16:9 ratios without cropping or stretching.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Load your photo into the canvas workspace.
Choose 1:1, 4:5, 16:9, 9:16, 4:3, or 3:2.
Pick a custom padding color or enable transparent PNG padding.
Export the padded graphic.
Yes, the original image pixels are preserved without downsampling.
Yes, check the Transparent Padding option to export a transparent PNG.
Zero-egress companion tools in the Image Processing suite
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Extract spatial gradient edges using Sobel and Laplacian convolution kernels.
