Image Resizer
Resize by exact pixels or percentage, lock the aspect ratio, and compress in the same pass. Drop images below, no sign-up.
- ✓Batch up to 25 MB per file, free
- ✓Resize by pixels or percent, ratio locked
- ✓Also export WebP or AVIF in one pass
Drag & drop images here
JPG, PNG, WebP, AVIF up to 25 MB
Exact dimensions
Resize by pixels or percentage to hit the exact size your layout needs.
Aspect ratio locked
Proportions stay intact automatically — no stretching or squishing.
Resize & compress
Every resized image is optimized in the same pass — two wins in one step.
More free tools
All free, all private. Pick the right one for the job.
How to resize an image online
Oversized images are the most common cause of slow pages. OctoSqueeze lets you resize to the exact dimensions you need — by pixels or percentage — and compresses the result at the same time, so you ship images that are the right size in every sense.
Why dimensions matter
Lighter images load faster, improve your Core Web Vitals, and save bandwidth for you and your visitors. On mobile especially, a 2 MB hero image can be the difference between a bounce and a conversion.
Resize and convert together
Pair resizing with a modern format like WebP or AVIF to squeeze the most out of every image.
Do it at scale
Resizing one image is easy. Resizing thousands is what our REST API is for — one call returns an optimized file (or a CDN URL) in any format and size you need.
Frequently asked questions
Everything you need to know about resizing images online.
Contact supportUpload your image and our engine will automatically optimize it for the best file size while preserving quality. Download the optimized result in your preferred format.
Yes. The original aspect ratio is always preserved during optimization. Your images won't be stretched or distorted.
You can resize images up to 10,000 x 10,000 pixels. For best results when enlarging, start with the highest resolution source image possible. Resizing down always preserves quality well.
Yes! Upload multiple images and they will all be resized to the same dimensions. This is perfect for preparing images for a website, social media, or e-commerce product listings. Check our pricing plans for high-volume resizing.