Resize multiple images at once
Load up to 10 images, enter a target width or height, then apply the same resize rule to the whole batch.
Free Bulk Image Resizer & Converter
Upload & Previews
Drag & drop images here (up to 10)
Or click “Upload Images” to choose files.
Resize & Save
Enter either width or height; the other adjusts to preserve each image’s aspect ratio.
Batch Save (ZIP)
Note: This tool exports the browser-supported canvas formats: JPG, PNG, and WebP. PNG/JPG are safest across browsers.
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Bulk image resizing and conversion guide
Use this tool when you need to resize multiple images at once, convert JPG, PNG or WebP files, and download the results without uploading your images to a server.
Keep aspect ratio automatically
Enter only width or only height. The other dimension is calculated from each image's original proportions, so photos are not stretched.
Convert formats in bulk
Save individual files or export the full batch as JPG, PNG or WebP in a ZIP archive, depending on what your browser supports.
Process images locally
The resize and conversion work happens in your browser with canvas. Your selected files are not uploaded by this page.
Which export format should I choose?
| Format | Best for | Important note |
|---|---|---|
| JPG | Photos, product shots and smaller file sizes. | JPG does not preserve transparency. Transparent areas become a solid background. |
| PNG | Logos, screenshots, UI images and transparency. | PNG is often larger, but it keeps transparent pixels. |
| WebP | Modern web images where small files matter. | This canvas export creates static WebP files. It will not preserve animation from animated GIFs or animated WebP files. |
Bulk Image Resizer FAQ
Can I resize multiple images at once?
Yes. Upload or drag in up to 10 images, choose a width or height, and use "Apply to all" to resize the whole batch.
Can I convert JPG to WebP in bulk?
Yes, if your browser supports WebP canvas export. Use the "All -> WebP (ZIP)" button to convert every loaded image into static WebP files.
Will my images be uploaded?
No. The files are read and processed locally in your browser. The page does not send your selected images to Starlight Tools.
Can I download all resized images as a ZIP?
Yes. Choose "All -> JPG (ZIP)", "All -> PNG (ZIP)" or "All -> WebP (ZIP)" to package the current resized images into one download.
Can I keep the original aspect ratio?
Yes. Enter either width or height, not both. The tool calculates the matching dimension for each image so the resized result keeps its shape.
Can I resize images by percentage?
This page currently resizes by exact width or height, not percentage. To resize by 50 percent, enter half of the original width or half of the original height.
Does JPG preserve transparency?
No. JPG does not support transparent pixels. Use PNG or WebP when you need to keep transparency in logos, icons or cutout images.
What is the best format to export?
Use JPG for photos, PNG for transparency and crisp screenshots, and WebP for modern websites where smaller static image files are useful.