Bulk Image Resizer
100% Client-SideBulk Image Resizer allows you to batch scale, crop, and resize multiple graphic files (PNG, JPG, WebP) simultaneously without uploading them. The client-side processor loads the selected file list, reads their pixel layouts onto canvas grids, and scales their coordinates. Users can select percentage scales, target pixel widths, or target heights while preserving original aspect ratios. Once resizing is complete, the tool leverages JSZip to compress all output image files into a single, clean ZIP package. This offline processing is fast, resource-efficient, and secure.
Open Bulk Image ResizerHow It Works
Upload Multiple Images
Select any number of JPEG, PNG, or WebP files to resize simultaneously.
Define Output Dimensions
Choose resizing by scale percentage, width, or height, and check the aspect ratio lock if desired.
Generate ZIP
Click Convert. The browser scales all files in memory, compiles them, and triggers a clean ZIP download.
Frequently Asked Questions
How do I resize a batch of images at once?
Upload multiple JPEG/PNG/WebP files into our workspace dropzone, select your target dimensions (or percentage scale), choose whether to maintain aspect ratios, and click convert to download them all compiled in a ZIP archive.
What formats does the bulk resizer support?
It supports standard web formats including JPEG, PNG, and WebP, outputting them in high quality.
Is there a limit to the number of images I can batch process?
There is no hardcoded cap, but processing speed depends on your local hardware resources. We recommend batches of up to 50 images for optimal performance.