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.
Use cases
- Make photos fit size rules on job portals, marketplaces and government forms.
- Shrink phone photos (often 4000 px wide) to a sensible web size like 1600 or 1280 px.
- Resize a whole set of product photos to the same width in one batch.
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 |
Common mistakes
- Entering both width and height with “Keep proportions” on, then expecting exactly that size. The image is fitted inside the box, so one side can come out smaller. Untick it to force exact dimensions (which can stretch the picture), or crop first.
- Resizing when you actually need a smaller file size in KB. Use the Image Compressor or a ready-made “compress to 100 KB” page instead.
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.
How do I resize to an exact size like 1080 × 1080 without stretching?
Crop the image to the right shape first with the Image Cropper (1:1 for 1080 × 1080), then resize it here with “Keep proportions” on.
Which format does it save?
By default the same format as the original (JPG, PNG or WebP; other formats are saved as PNG). You can also choose JPG, PNG or WebP. JPG and WebP are saved at 90% quality, and each file name gets the new size added, such as photo-1280x960.jpg.
Is there a size limit?
Output is limited to about 16 megapixels so phones don't run out of memory; larger results are scaled down and marked. Photos are turned the right way up using their orientation tag, and other metadata such as location isn't copied to the resized file.
Last reviewed by the M2Toolkit team.