Image Resizer / Batch Resizer
Upload one or more images and resize them all at once, to an exact width and height, to fit within a maximum width/height while keeping the aspect ratio, or by a simple percentage scale. Each resized image is rendered on canvas and offered as its own download, so you can batch-process a whole folder of photos without installing anything.
Reviewed by Vincenzo Manto, Founder & Lead Developer · Last updated September 27, 2026
How it works
- 1
Drop or select one or more images (JPG, PNG, WebP, etc.).
- 2
Choose a resize mode: exact width/height, max width/height with aspect-ratio lock, or percentage scale.
- 3
Preview the new dimensions for every image in the list.
- 4
Download each resized image individually, or download the whole batch in one click.
Batch resizing without installing software
Resizing a handful of product photos, blog images, or social media assets usually means opening each one in an editor one by one. This tool applies the same target size to every image you drop in, so a batch of ten photos takes the same few clicks as resizing one.
Three ways to control the output size
Percentage scaling is the fastest way to shrink everything uniformly. Max width/height is ideal when you need images to fit a layout without exceeding a size, like a 1280px-wide content column. Exact size is for cases like fixed thumbnail grids where every image must share identical dimensions.
Frequently asked questions
Are my images uploaded to a server?
No. Every image is decoded and resized locally using the HTML canvas API in your own browser tab, so nothing is sent anywhere.
Can I resize many images at the same time?
Yes. Select or drop multiple files and the same resize settings are applied to each one, with individual download buttons plus a download-all button.
What's the difference between 'max width/height' and 'exact size'?
'Max width/height' fits the image within a bounding box while preserving its aspect ratio, so it never gets stretched. 'Exact size' forces the exact pixel dimensions you enter, optionally locking the aspect ratio from just the width.
Does resizing reduce image quality?
Shrinking an image loses some detail (as with any resize), but the canvas resampling used here produces smooth, good-quality results comparable to desktop image editors.
Which output formats are supported?
You can export the resized images as PNG, JPEG, or WebP.
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