Bulk Image Resizer & ZIP Packer
Drop a whole folder. Set a max width or height. Pick a format. Download the whole batch as one .zip. Aspect ratio is always preserved.
Drop images here or tap to choose
PNG · JPEG · WEBP · batch of any size
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Leave a dimension blank to not cap it. If both are set, the larger of the two ratios wins so neither limit is exceeded. Smaller images are never upscaled.
How this tool works
Each dropped image gets decoded into a hidden <canvas>, scaled down to your chosen max dimensions (aspect-locked, never upscaled), then re-encoded in your chosen format and quality. The resulting blobs are streamed into a single JSZip archive that downloads when you click the button.
Nothing is uploaded. JSZip is loaded only when you actually need it.