Bulk Image Resizer
Resize multiple images in batch mode. Define custom pixel resolutions, maintain aspect ratio guidelines, select export file formats (JPG, PNG, WEBP), and download outputs compiled inside a single ZIP file.
Click, Drag & Drop or Paste Batch Images Here
Select multiple JPG, PNG, WEBP, or HEIC files (Max 15MB each)
Resizing Options
How the Bulk Image Resizer Works
Manually resizing tens or hundreds of files for online catalog uploads, listings, or sharing is slow. Our **Bulk Image Resizer** utilizes async rendering threads to process multiple images in parallel entirely client-side. The tool scales, crops, or stretches image bounds based on aspect preferences, adjusts encoding qualities, and compiles the collection into a structured ZIP folder ready for download in standard format types.
Aspect Ratio Modes Explained
- Fit Inside Bounds: Scales the image down so that it fits entirely within the target width and height, avoiding clipping or distortion. White padding is applied to fill empty regions.
- Center Crop: Scales the photo to fill the target width and height entirely, clipping left/right or top/bottom edges as necessary to preserve aspect ratios.
- Stretch: Forces the image to occupy the exact target pixel count, ignoring aspect ratio locks.
Frequently Asked Questions
Does the ZIP compiler run on mobile devices?
Yes, JSZip executes in modern smartphone web browsers. For batch sizes larger than 25 files, ensure your device has sufficient RAM memory to compile the package safely.
Can I maintain original aspect ratios for different dimensions?
Yes. If 'Maintain Aspect Ratio' is enabled, the tool resizes each file using the width boundary as a ceiling, calculating heights proportionally.