Resize Image changes the dimensions of your pictures. Enter a new width or height in pixels, or scale by percentage. Proportions are kept by default so your photos never look stretched.
Resize images to the exact size you need
Every platform asks for different image sizes: a profile picture, a banner, a thumbnail, a passport photo or a product image. Instead of opening heavy software, you can change the width and height of your pictures here. You can resize by pixels or by percentage, resize many photos at once and keep the proportions so nothing looks stretched.
Why image dimensions matter
- Faster websites. Uploading a 5000 pixel photo into a 800 pixel wide space wastes bandwidth.
- Upload rules. Forms may require specific dimensions or maximum sizes.
- Social media. Each network crops and compresses images differently. Using the recommended size avoids surprises.
- Printing. The number of pixels determines how large a photo can print sharply.
- Smaller files. Fewer pixels mean smaller files, which is helpful for email.
Resize by pixels
Enter a width, a height, or both. If you fill in only the width, the height is calculated automatically so the picture keeps its shape. The same goes for height. If you enter both and choose Keep proportions, the image is scaled to fit inside that box without distortion. If you choose Stretch to exact size, the image is forced into your numbers, which can make people and objects look squeezed or wide.
Resize by percentage
Percentage resizing is easy when you do not care about exact numbers. Entering 50 halves the width and height, creating an image with a quarter of the pixels. Entering 200 doubles the size, though enlarging cannot add real detail and may look soft.
Making images smaller versus larger
Reducing an image is safe: the tool combines pixels and the result stays sharp. Enlarging is different. The browser must invent new pixels, so a small picture stretched very large looks blurry. If you need a large image, start with the highest resolution original you can find.
How it works
Each image is decoded in your browser, drawn onto a canvas of the new size with smooth scaling and then saved in the same format as the original. PNG files stay PNG, WebP files stay WebP and other photos are saved as JPG. The file name includes the new dimensions so you can recognise the result.
Privacy
Pictures remain on your device. Nothing is uploaded or stored by this website.
Tips
- Keep the proportions unless you know you need a stretched result.
- For websites, a width between 800 and 1600 pixels is enough for most content images.
- Resize first and compress afterwards for the smallest file.
- Work from your original, not from a picture that has already been resized several times.
Troubleshooting
It asks me for a width or height. When resizing by pixels at least one of them is required.
The result looks blurry. You probably enlarged a small image. Use a bigger original.
The output format is different. The tool keeps PNG and WebP, and saves other pictures as JPG. Use the Convert Image tool to change format.
Free to use
Add your images, set the new size and download the results at no cost.
A real-world example
Kamran needs a profile photo of 400 by 400 pixels for a job portal, but his picture is 3000 by 2000 pixels. First he crops the photo to a square, then enters a width of 400. The height is calculated automatically, and he downloads a neat photo that meets the requirement and loads quickly.
Checklist before you download
- You know the target size in pixels, or the percentage you want.
- Proportions are kept unless you really need a stretched image.
- You are resizing from the original photo, not from a small copy.
- You checked the final dimensions in the file name.
Related tools
Crop Image to Ratio gives you the right shape before resizing, Compress Image reduces the file size afterwards, and Favicon Generator creates small square icons from a logo.
More questions about this tool
What size should website images be?
For article images, a width of 1000 to 1600 pixels is usually enough. Thumbnails can be 300 to 600 pixels wide. Larger images only slow down your pages.
Does resizing change the file format?
PNG and WebP images keep their format. Other pictures are saved as JPG. Use the Convert Image tool if you want a different format.
How to use Resize Image
- Select one or more images (JPG, PNG or WebP).
- Choose your settings.
- Click "Resize images" and download the results.
Frequently asked questions
How do I keep the proportions?
Fill in only the width or only the height, and the other side is calculated automatically.
Can I resize many images at once?
Yes. Select several files and they are all resized with the same settings.
Is this tool really free?
Yes. All tools on this website are free to use, with no sign-up needed.
Are my files and data safe?
Yes. Everything is processed inside your own browser. Your files and text are not uploaded to our servers.
Does it work on mobile?
Yes. The tools work on modern phones, tablets and computers.