Load an image to begin.
This image resizer changes the pixel dimensions of a picture using the browser canvas. Type an exact width and height, scale by a percentage, or click one of the common width presets: 1920, 1280, 800, 600, 400 or 150 pixels. The aspect ratio lock keeps the second dimension in step so nothing gets stretched. Drawing uses high quality image smoothing, which gives a cleaner downscale than a plain nearest neighbour shrink.
You can also change the output format while resizing. JPEG and WebP have a quality slider because both are lossy; the slider disappears for PNG since PNG is lossless and ignores any quality value. Note that going through canvas re-encodes the pixels and discards all EXIF metadata, including the orientation tag, so a photo that relied on that tag may need rotating first. The stats row compares old and new dimensions and file sizes.
How to use the Image Resizer
- Add an image by choosing a file or dragging one onto the drop area. The original dimensions fill in automatically.
- Pick pixel dimensions or percentage mode, then set your target. Keep the aspect ratio lock on unless you want to distort the image.
- Choose JPEG, PNG or WebP output, and adjust the quality slider if you picked a lossy format.
- Press Resize image, check the before and after stats, then use Download result to save the new file.
Frequently asked questions
Is my image sent to a server?
No. The file is read locally, drawn to a canvas element and re-encoded in the browser. There is no upload, no temporary storage and no request to any server. Everything you see happens on your own device.
Can I make an image larger than the original?
You can enter dimensions bigger than the source, and the tool will warn you. Upscaling only interpolates existing pixels, so it cannot recover detail that was never captured. Enlarged images usually look soft or blurry, especially past about 150 percent.
Why does the quality slider vanish when I choose PNG?
PNG uses lossless compression, so browsers ignore any quality argument passed to canvas.toBlob for that format. Showing a slider that does nothing would be misleading. Pick JPEG or WebP if you want to trade visual quality for a smaller file.
Will the resized file keep my EXIF data?
No. Canvas works with decoded pixels only, so the output contains no EXIF at all. Camera model, date, GPS coordinates and the orientation flag are all stripped. That is good for privacy, but check the rotation of phone photos after resizing.