Batch Resize Multiple Images at Once
Upload up to 5 images and apply the same resize settings to all of them. Set custom dimensions, scale by percentage, or choose a preset. Processing happens in your browser — your images stay private.
How Batch Resize Works
Resizing multiple images with ImageSizr.com is straightforward:
- Upload up to 5 images at once — drag and drop, click browse, paste from clipboard (Ctrl/Cmd+V), import from a URL, or connect Google Drive, Dropbox, or OneDrive. Supports PNG, JPG, WebP, GIF, BMP, TIFF, AVIF, SVG, ICO, and HEIC up to 10 MB each.
- Set the target dimensions — enter custom pixel dimensions, use the percentage slider, or pick a social-media or device preset in the editor.
- All images are resized with the shared settings — every file in the batch follows the same resize configuration.
- Download each result individually — click Download on each image card to save the resized file.
Only have one image? Use the single-image resize tool for the same powerful controls with a streamlined workflow.
Same Powerful Resize Options
The bulk resize tool gives you all the same resize modes available on the single-image resizer:
- Custom Pixel Dimensions — enter exact width and height values with aspect-ratio lock to maintain proportions.
- Percentage Scaling — scale all images by a percentage with quick presets at 25%, 50%, and 75%.
- Social-Media Presets — ready-made sizes for Instagram (Profile, Square Post, Portrait, Landscape, Story, Reels), Facebook (Profile, Cover, Shared Image, Story), Twitter/X (Profile, Header, In-stream, Card), and YouTube (Channel Profile, Cover, Thumbnail).
- Device & Screen Presets — display resolutions from HD 720p through 4K UHD, plus specific devices including iPhones, Android phones, iPads, and laptops.
- Unit-Flexible Input — specify dimensions in pixels, centimetres, inches, or millimetres. Non-pixel units are converted automatically using 96 DPI.
Flexible Output
Control exactly how your batch-resized images are exported:
- Original Format — keep each file’s uploaded format unchanged for mixed-format batches.
- JPEG — lossy compression ideal for photo batches, product images, and web thumbnails.
- PNG — lossless output with transparency support for screenshot sets and graphic asset batches.
- WebP — modern compression with excellent quality-to-size ratio for web-optimized image sets.
- ICO — multi-size icon bundles containing 16, 32, 48, 64, 128, and 256 px variants.
Adjust quality settings and set a background colour for transparent images when exporting to JPEG. Each file downloads individually to your device.
Related Tools
- Resize a single image — the full-featured resizer for working with one file at a time.
- Compress images to reduce file size — optimize your batch-resized images for faster page loads.
Image guides and tutorials — learn more about resizing, compression, and image optimization.
Learn More
Frequently Asked Questions
Is ImageSizr free to use?
Yes. ImageSizr is completely free with no account or sign-up required.
Are my images uploaded to a server?
No. All processing happens directly in your browser. Your images never leave your device, so your data stays private.
Can I resize multiple images at once?
Yes. The Bulk Resize tool lets you upload up to 5 images and apply the same resize settings to all of them. You can then download each result individually.
How to resize an image?
1. Upload your images using drag-and-drop, browse, clipboard paste, URL, or cloud storage. 2. In the editor, enter new dimensions, use the percentage slider, or pick a preset. 3. Click Download to save each resized image.
Can I resize to exact social-media dimensions?
Yes. Switch to the Social Media resize mode and choose a platform (Instagram, Facebook, Twitter/X, or YouTube), then select the specific preset.
How do I keep the original proportions?
Enable the Lock Aspect Ratio option. When locked, changing one dimension automatically adjusts the other to maintain the original proportions.
What image formats are supported?
You can upload PNG, JPG/JPEG, WebP, GIF, BMP, TIFF, AVIF, SVG, ICO, and HEIC files. Output formats include the original format, JPEG, PNG, WebP, and ICO.
What is the maximum file size?
Each file can be up to 10 MB. You can upload up to 5 files at a time.