Mass Image Resizer
Resize a Large Set of Images at Once
Need to use Mass Image Resizer right now?
No need to resize each image individually — select the whole set and process it in one pass.
Click to add images (select multiple)
Processed locally in your browser — never uploaded
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
Who uses this tool?
About Mass Image Resizer
Resizing images one at a time gets tedious fast when you have a whole folder to process — a batch of product photos, a gallery of images for a website, or a set of screenshots that all need the same maximum dimensions applied.
This tool lets you select multiple images at once, applies the same maximum width and height constraint to all of them (with an option to preserve each image's individual aspect ratio), and packages every resized result into a single downloadable ZIP file.
Because each image keeps its own aspect ratio by default (when that option is enabled), a batch of differently-shaped photos all end up properly scaled to fit within your maximum dimensions without any of them being stretched or distorted.
This is useful for preparing a whole folder of images for web upload with consistent maximum dimensions, resizing a batch of photos before archiving, standardizing image sizes across a product catalog, and any bulk image resizing task.
How it works
- Select multiple images. Add as many as you need to the batch.
- Set maximum width and height. Optionally preserve each image's own aspect ratio.
- Download all resized images as a ZIP. One click processes and packages the entire batch.
Examples
Resizing a folder of product photos for web upload
Input
20 photos of varying sizes, max 1200×1200px, aspect ratio preserved
Output
A ZIP file containing all 20 photos, each scaled to fit within 1200×1200px