Resize Image
Resize JPG, PNG, and WebP images to exact pixel dimensions in your browser. No upload required — set width, height, and download instantly.
Drop files here
or click to browse · batch supported
Choose filesWhy resize images in the browser?
Uploading an image at a higher resolution than it will ever be displayed wastes bandwidth for every visitor. A 4000 × 3000 px photo displayed at 800 × 600 px requires the browser to download 4× as many pixels as it actually renders — a silent performance cost on every page load. Resizing before upload is the most direct way to reduce image payload without touching quality settings.
Resizing in the browser is also the most private path: your files never travel to a server. For proprietary product photography, client assets under NDA, or personal images you prefer not to upload, browser-side processing means the file stays on your machine from start to finish. The result is downloaded directly to your device without any intermediate copy in the cloud.
The tool preserves your image's format: PNG input produces a PNG output at the new dimensions, keeping lossless quality and transparency intact. WebP input produces a WebP output — alpha channel included. JPEG input produces a JPEG output. The Canvas API handles the downsampling, applying bicubic-quality interpolation to produce clean edges and smooth gradients at the target dimensions.
Frequently asked questions
JPG, PNG, and WebP are all supported. Each file keeps its source format at the new dimensions: PNG → PNG (lossless, transparency preserved), WebP → WebP (alpha channel preserved), JPEG → JPEG. If you need a different output format after resizing, use one of the converter tools.
When enabled, the height of each image is calculated automatically from the width you enter, using the image's own proportions. A landscape photo and a square icon uploaded together will each resize to the specified width with their correct heights — no cropping, no stretching. Disable it to force an exact width × height regardless of the original proportions.
Yes. Drop multiple files in one go. Each image is resized independently: with "Keep aspect ratio" on, each file computes its own height from its own proportions. The results appear as a list and can be downloaded individually or as a ZIP archive.
The tool supports output dimensions up to 8000 × 8000 px, which covers the vast majority of practical use cases. The limiting factor in practice is device memory: very large output sizes (above 4000 px on either axis) can be slow on low-end devices, since the Canvas API processes the full pixel grid in memory.