Image Resizer: Resize Images to Exact Pixel Dimensions Free Online
Set an exact width and height, or scale by percentage. Your images stay on your device.
Drop an image here or browse files
JPEG · PNG · WebP · GIF
How to Resize an Image Online — Free & Private
Give this tool a width and a height, or a percentage, and it redraws your image at that size inside your browser. Your image never reaches a server, so nobody else can see the photo you are resizing.
Why the resampling method matters
Shrinking an image throws away pixels, and the way a tool chooses which ones to keep decides whether the result looks sharp or mushy. A browser scaling an image in one bilinear step averages neighbouring pixels and loses fine texture, which you notice most in text, hair, and brickwork. This tool runs Lanczos3 resampling in stages through the pica library, weighing a wider neighbourhood of pixels at each step. Small versions keep their edges.
Keep aspect ratio stays on by default. With it on, you type one dimension and the other follows, so your photo never stretches. Turn it off when a layout demands exact numbers and you would rather accept the distortion than crop.
Single and batch
Single mode gives you one image, a preview, and the before-and-after numbers. Batch mode takes a folder's worth and applies one target size to all of them. In batch with the ratio locked, the width you set drives every image and each one works out its own height, so a mix of portrait and landscape photos comes out consistent instead of squashed.
Resizing or compressing?
These solve different problems. Resizing changes how many pixels an image has, which you want when a layout calls for 800 pixels wide or a marketplace asks for square photos. Compressing changes how many bytes those pixels take up, which you want when a form rejects anything over 2 MB. If you need a specific file size rather than specific dimensions, the Image Compressor takes a target like 100 KB or 1 MB and finds the quality setting that fits.
Related tools
To make an image bigger rather than smaller, the Image Upscaler enlarges up to 4× with the same Lanczos resampling. To change format without changing size, use the Image Converter. For iPhone photos, the HEIC Converter turns HEIC into JPEG or PNG first.
Frequently Asked Questions
Is the Image Resizer free?
Yes, completely free. No account, no subscription, and no watermark on the resized image.
Are my images uploaded to a server?
No. Resizing runs in your browser using canvas and the pica resampling library. Your images stay on your device.
How do I resize an image to exact pixel dimensions?
Choose the Dimensions method, then type the width and height you need. Turn off Keep aspect ratio if you want both numbers honoured exactly, otherwise the height follows the width so the image keeps its proportions.
Can I resize multiple images at once?
Yes. Switch to the Batch tab, drop in as many images as you like, and one target size applies to all of them. With the aspect ratio locked, each image keeps its own proportions.
Will resizing make my image blurry?
Shrinking uses Lanczos3 resampling, which keeps edges sharper than the browser default. Enlarging beyond the original size cannot add detail that was never captured, so use the Image Upscaler for that.
What image formats can I resize?
JPEG, PNG, WebP, and GIF go in. You can save the result as JPEG, PNG, or WebP.