Tooooolbox
100% private — no upload
Need a photo at a specific pixel dimension? Set the max width/height field to your target size and drop your images. The tool resizes proportionally (no stretching) and optionally compresses at the same time — all locally in your browser.
PNG, JPG, GIF, WebP, HEIC up to 50MB per file
Choose filesResizing changes how many pixels an image contains. Compressing changes how efficiently those pixels are stored. Both make the file smaller, but they do it in fundamentally different ways, and the difference matters when you are trying to preserve quality.
Resizing is usually the better first move. Removing pixels the viewer was never going to see costs nothing visually, whereas heavy compression damages the pixels that remain. Halving an image's width and height cuts the pixel count to a quarter — and the file size roughly in proportion — with no visible loss if it is still larger than its display size.
Setting a single maximum dimension preserves the original proportions automatically: a 4000×3000 photo limited to 1600px becomes 1600×1200. Forcing both width and height independently stretches the image and is almost always a mistake, particularly on photos of people.
Upscaling deserves a specific warning. Enlarging a 500px image to 2000px cannot add detail that was never captured — the software invents pixels by interpolating between existing ones, and the result looks soft and plastic. If you need a larger image, the only real solution is to go back to a higher-resolution original.
Set the Max Width/Height field to your target dimension (e.g. 800 for an 800px-wide image). The tool scales proportionally, so neither width nor height will exceed that value. For a specific aspect ratio, crop in your photo editor first, then resize here.
Downscaling (making smaller) is lossless in practice — the output is sharper than an upscaled image. Set quality to 90–100% to preserve detail. Upscaling is not recommended: it adds pixels by interpolation and rarely looks good.
Resizing changes the pixel dimensions of the image. Compressing reduces file size, often by reducing quality or changing format. Both reduce file size, but resizing preserves the quality at the new dimensions while compression sacrifices some detail.
No — this tool resizes proportionally. If your image is 3000×2000px and you set max to 1500px, the result will be 1500×1000px, preserving the original ratio.