Archive Tools
Resize & Convert
Bulk resize and re-encode images for the web. Optimized WebP or JPEG, local processing, one ZIP download.
Drop images here
or
JPG, PNG, WebP. One image or many. Processed locally, nothing is uploaded.
About this tool
A small browser-only utility for the kind of image wrangling that usually means opening Lightroom or running a shell script. Drop in a batch of source files - from a phone, camera, or folder on disk - pick a target width and output format, and download the whole batch as a ZIP with the original filenames preserved.
Output defaults to WebP at 1920px width, which is a good pairing for the modern web: roughly 5-10 times smaller than the equivalent high-quality JPEG at the same dimensions, with visual quality that is essentially indistinguishable at normal viewing sizes. Every modern browser supports it. If you need the older format, JPEG is one click away.
Nothing is uploaded. Images are decoded, resized, and re-encoded entirely in your browser using the browser's native canvas and WebP encoders. Only the JSZip library itself is fetched over the network, and only when you click Convert.
Practical batch ceiling: around 100 images on a desktop browser, 50 to 75 on desktop Safari, 15 to 30 on mobile Safari. The bottleneck is the in-memory ZIP blob before download, which scales with total output size.