How to use the Image Resizer
- Choose one or more images, or drag them onto the box.
- Pick your settings — pixels or percentage, and whether to keep proportions.
- Check the new size next to each file.
- Download each image, or all of them as a ZIP.
What does this tool do?
Resizing changes an image's pixel dimensions. With “keep proportions” on, you only need to enter a width or a height and the other is calculated for you, so nothing gets stretched.
Large reductions use step-by-step downscaling, which avoids the jagged edges and moiré you get from a single-step resize.
Why use it?
- Prepare images for websites, marketplaces and social media.
- Meet exact dimension requirements on forms.
- Resize a whole folder of photos at once.
Common sizes
Popular target dimensions:
| Use | Size (px) |
|---|---|
| Instagram square post | 1080 × 1080 |
| Instagram portrait | 1080 × 1350 |
| Facebook / LinkedIn link image | 1200 × 630 |
| YouTube thumbnail | 1280 × 720 |
| Full HD wallpaper | 1920 × 1080 |
| Website hero image | 1600–2400 wide |
Privacy
Your files are processed entirely in your browser using built-in web technologies. They are not uploaded to our servers, and closing the page clears them from memory. There's no account to create and nothing to install.
Frequently asked questions
Are my photos uploaded?
No. Everything happens in your browser using the Canvas API. Your images never leave your device, which is why it works even on a slow connection.
Can I make a small image bigger?
Yes, but enlarging can't add detail that isn't in the original, so big enlargements look soft.
Last reviewed by the M2Toolkit team.