Resize any image by pixels or percentage — right in your browser
Our free Image Resizer changes the dimensions of your pictures without desktop software, an account, or a single upload to a server. It works by drawing your image onto an HTML canvas at the exact size you specify and re-encoding the result, so the entire process runs locally on your device. That means private family photos, confidential screenshots, and paid client assets stay entirely under your control from start to finish.
Resizing is one of the most common image chores: fitting a banner into a fixed layout, shrinking a photo so it uploads under a size limit, preparing thumbnails for a store, or matching a platform's required dimensions. This tool handles all of those with two simple modes — enter exact pixel values, or scale by a percentage such as 50% or 200% — and it shows you the resulting dimensions and file size live before you download anything.
Because the aspect ratio can be locked, you never have to do the math to keep an image from stretching or squashing; change the width and the height follows automatically. When you do need a precise non-proportional size, one toggle unlocks free resizing. Finished images export as PNG, JPG, or WebP with an adjustable quality control, giving you the same flexibility as paid editors in a page that loads in seconds on any device.