Resize Image
Scale one image or a whole batch to exact dimensions.
Drop images to resize or click to browse
Processing happens on your device. Nothing is uploaded.
100% Private
Files are processed locally in your browser. They never touch our servers.
Smart Defaults
Sensible settings are applied automatically. Fine tune them only if you want to.
Batch Processing
Drop multiple images at once and download everything together as a ZIP.
How to use Resize Image
- Drop your images onto the page, or click to pick them from your device
- Use the default settings, or adjust the options for your file type and target result
- Download the finished images one by one, or save the full batch as a ZIP
What Resize Image is for
Use the Resize Image tool when an image has the wrong dimensions or is much larger than it needs to be. Resizing is useful before uploading images to websites, marketplaces, forms, social platforms and design layouts.
- Resize large photos to exact pixel dimensions before uploading them.
- Create smaller web-ready versions of oversized camera images.
- Batch resize images while keeping the aspect ratio locked.
- Prepare images for websites, profile photos, thumbnails and online forms.
Best practices for better results
Image optimization works best when you choose the right balance between file size, visual quality, dimensions, format compatibility and privacy. These tips help you get a cleaner result.
- Resize images to the largest size they actually need to display.
- Keep aspect ratio enabled unless you intentionally want to stretch the image.
- For website images, resizing first and compressing second usually gives better results.
- Use exact pixel sizes when preparing images for templates, upload forms or design systems.
Resize images by pixels or percentage
Resizing changes how many pixels an image contains, and pixels are the single biggest factor in file size. Halve an image's width and height and you have removed three quarters of its data before compression even enters the picture. Our resizer offers two modes: exact pixels, when a platform demands specific dimensions, and percentage, when you just want everything 50 percent smaller. The aspect ratio lock is on by default so nothing gets stretched or squashed.
Common sizes worth knowing
| Use | Dimensions |
|---|---|
| YouTube thumbnail | 1280 x 720 |
| Instagram post | 1080 x 1080 |
| Instagram story | 1080 x 1920 |
| Facebook cover | 820 x 312 |
| X / Twitter header | 1500 x 500 |
| Blog content image | 1200 to 1600 wide |
Enter just a width and leave height blank, and the tool calculates the matching height automatically. Give it both with the lock on, and your image is fitted inside that box without distortion.
Resize images in bulk, then compress
The resizer is batch native: drop fifty photos, set 1600 pixels wide, and every file is processed in parallel on your own device with no upload step. For the smallest possible results, resizing is step one and compression is step two. Resize here, then send the output through the image compressor. The combination of right sized pixels and quality 80 encoding is what makes a 6 MB phone photo land under 250 KB while still looking great on any screen.
Related image tools
These tools solve similar image optimization problems and work the same way: locally in your browser, with no required upload.
- Compress Image: Reduce the file size of JPG, PNG and WebP images
- Compress JPEG: Reduce JPG file size with smart quality compression
- Compress PNG: Optimize PNG files losslessly for smaller downloads
- Compress WebP: Make WebP images even smaller with adjustable quality
Resize Image FAQ
Is Resize Image free to use?
Yes. Every tool on CompressImage.ca is free to use, with no signup, no watermarks and no daily limits.
Are my images uploaded to a server?
No. Processing happens locally in your browser using your own device. Your files never leave your computer or phone.
What image formats are supported?
JPG, PNG and WebP work across the main tools. AVIF and HEIC are supported in the tools that specifically mention them.