Resize multiple PNG, JPEG and WebP images locally. Fit each within a maximum size or scale by percentage, preserve aspect ratios and download successful results together in a ZIP.
| Original file | Status | Output |
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Your images are never uploaded to any server; decoding, resizing and ZIP packaging run locally in your browser. Sequential processing keeps only one full decoded source active at a time. No image history or account is needed, and you control when results are downloaded.
Select 1–20 files, each nonempty and up to 20 MiB, with a combined input limit of 80 MiB. Each source is limited to 40 megapixels and 16,384 pixels per side. Each output is limited to 16 megapixels and 8,192 pixels per side. Encoded images in a batch are limited to 100 MiB in total; files that would exceed it are reported as failed. Browser memory may impose lower practical limits.
No. Fit mode scales each image to fit inside both maximum dimensions while keeping its aspect ratio, with integer-pixel rounding. No padding or crop is added. Do not enlarge smaller images is enabled by default and applies only to Fit mode. Percentage mode scales each original independently, accepts 0.01–1,000% with up to two decimals and rounds tiny dimensions to at least one pixel.
Static PNG, JPEG and WebP are supported. SVG, GIF, AVIF, HEIC and detected animated PNG/WebP are not supported. Keep each original format retains its type, but re-encodes the pixels. You can instead select a single output type for the entire batch. JPEG uses the selected background for transparency; PNG/WebP keep alpha. Quality applies to JPEG/WebP and does not promise a particular file size.
Successful outputs use indexed, sanitized filenames to avoid collisions and archive paths. report.json contains original filenames, settings, success/error details, dimensions and byte sizes. Failed images are omitted from the image outputs but remain in the report and result table. The ZIP stores already-encoded images without another compression pass. If all files fail, no ZIP is offered.
Yes. Stop, new file selection, setting changes and Clear discard pending results and disable the previous ZIP. A browser decode already underway cannot be forcibly aborted, but its result is discarded and released when it returns. Image encoding has a 15-second response limit. Previews show up to six successful images as small thumbnails rather than full decoded output images.
No. Canvas export makes a new raster image; original metadata, exact encoded bytes and color-profile behavior are not guaranteed. The browser handles image orientation and interpolation, and lossy re-encoding can change quality. Upscaling cannot restore missing detail. The tool never uploads or stores selected image content as application history.
