Resize images
Free, private and fast: everything runs in your browser and your image files are never uploaded.
Why resize images
Websites, shops, forums, application forms and email all work better with pictures of a sensible size, and some insist on an exact width, such as 1200 pixels for a blog header or a square avatar. Here you set the new width, the new height, or both, in pixels, or scale by a percentage. The aspect ratio is kept unless you switch that off, and when you give both a width and a height the image is fitted inside that box. Many images can be resized in one go; the list shows each one's new size before you start. The output keeps the format of the input where it can: JPG stays JPG, PNG stays PNG with its transparency, and WebP stays WebP in browsers that can write it. Resizing runs in your browser and your images are never uploaded.
How to resize images
- Drop your images in the box, or click to choose them. JPG, PNG, WebP, GIF, BMP and AVIF are accepted.
- Choose pixels or percentage and enter the new size. The list shows the result for each image.
- Click Resize images and download the image or a zip with all of them.
What to know about resizing
Pixel size and print size are different things
Resizing changes how many pixels the image has. The DPI or PPI number some programs show only tells a printer how many of those pixels to put in an inch; changing it alone does not make a file smaller or sharper. To print 10 cm wide at good quality you need roughly 1200 pixels across.
Keeping the shape
With the aspect ratio kept, entering only a width scales the height to match, and the other way round. With both filled in, the image is made as large as possible inside that box without being cropped. Turning the option off stretches the image to exactly the size you enter, which distorts faces and circles.
Enlarging does not add detail
You can scale an image up, for example to 200 %, but the new pixels are interpolated from the old ones. The result is bigger and softer, not more detailed.
Which format comes out
JPG is saved again as JPG at 92 % quality, PNG stays lossless and keeps transparency, and WebP stays WebP in Chrome, Edge and Firefox. Safari cannot write WebP, so there a WebP becomes a PNG and the list says so. GIF and BMP become PNG (only the first frame of an animated GIF), and AVIF becomes JPG.
Metadata is not kept
The resized file contains only the picture. Camera details and the GPS position of phone photos are removed, and photos are turned upright before resizing.
About the formats
JPG
JPG (or JPEG) is the most widely used image format for photos, supported by every camera, phone, browser and image editor. It uses lossy compression, which keeps files small at a small cost in quality.
- Best for photos; text and sharp lines can get blurry edges.
- No transparency: transparent areas become a solid colour.
- The quality setting trades file size against detail.
PNG
PNG (Portable Network Graphics) is a lossless image format from 1996 and the usual format for screenshots, logos, diagrams and images with transparency. Every pixel is stored exactly, so text and sharp edges stay crisp.
- Lossless: saving again never reduces quality.
- Supports full transparency (an alpha channel).
- Photos saved as PNG are usually several times larger than as JPG.
Frequently asked questions
Are my images uploaded?
No. The images are resized by your browser on your own device.
What size should I use for email or the web?
For an email or a web page, a width of 1200 to 2000 pixels is plenty for a photo shown on a screen. For a profile picture or a thumbnail, a few hundred pixels are enough. Gmail allows 25 MB of attachments per email, and attachments grow by about a third when they are sent, so resizing helps to fit more photos in one email.
Can I resize many photos to the same width?
Yes. Add them all, enter the width and leave the height empty. Each photo keeps its own aspect ratio, so portrait and landscape photos both come out right.
How do I make all images fit in a square?
Enter the same width and height, for example 1080 × 1080, and keep the aspect ratio. Each image is scaled to fit inside the square; it is not cropped or stretched.
What are the files called?
The new size is added to the name, for example photo_1280x960.jpg, so the resized copies do not overwrite your originals.