ShilaharStudios

About the image resizer

Resizing changes how many pixels an image has. Making it smaller discards detail and is what you want for the web; making it larger cannot invent detail that was never captured, so an enlarged image always looks softer than one taken at that size.

The aspect ratio lock is on by default because distorted images are almost never intended. Turning it off lets you stretch to an exact box, which is occasionally what a layout needs.

Frequently asked questions

Is my image uploaded anywhere?
No, and this is the whole point of the tool. The file is read by the page, processed by your own browser and handed straight back to you. It never reaches a server, there is nothing to delete afterwards, and you can disconnect from the network before choosing a file and it still works.
Will resizing make my file smaller?
Usually, and often dramatically - halving both dimensions leaves a quarter of the pixels. But the format matters too: a photograph saved as PNG can be larger than the JPEG you started with even at a smaller size. The result shows both figures.
Can I enlarge an image?
Yes, up to 20,000 pixels a side, but the tool says so when you are upscaling. Enlarging interpolates between existing pixels; it cannot recover detail, and beyond about 200% the softness is obvious.
Why is my photo rotated?
It should not be. Photos from phones record their orientation in metadata rather than in the pixels, and a tool that ignores it turns portrait shots on their side. This one reads the orientation and applies it before resizing.
Is there a size limit?
25 MB, and a warning above 10 MB. The constraint is memory rather than bandwidth: an image has to be decoded into a canvas to be worked on, and a 100-megapixel photograph needs far more memory decoded than it does on disk. A clear refusal is better than a tab that stops responding.

How your data is handled

Everything happens on your device. There is no upload, no storage and no logging. Closing the tab clears everything you entered.