Resize Images Online — Exact Size, Percentage or Presets

Resize without mangling your pixels

Making an image smaller sounds trivial, yet a naive resize can leave photos soft and jagged. This resizer uses multi-step halving: when the target is much smaller than the original, the image is scaled down in repeated 50% steps before the final pass. Each step is a cheap, high-fidelity operation, so the end result keeps far more detail than a single aggressive shrink. It all happens on a canvas inside your browser — the file is never sent anywhere.

Three ways to pick a size

Exact dimensions. Type a width and height in pixels. The aspect-ratio lock is on by default, so editing one side updates the other automatically and your picture never stretches; untick it only when you deliberately need a specific frame. Percentage. Enter 50 to halve the image, 25 to quarter it, or 200 to double it. Presets. One click sets the width for Full HD (1920), HD (1280), a typical blog image (800), an Instagram square feed width (1080), or the Twitter/X card ratio at 1200×675.

When should you resize?

Almost always before publishing. A 6000-pixel photo from a modern phone is wasted on a web page that displays it at 800 pixels — the browser downloads every pixel and throws 98% of them away. Resizing before upload cuts page weight dramatically, which speeds up your site, improves Largest Contentful Paint, and pleases both visitors and search engines. Marketplaces and forms also enforce dimension limits: eBay recommends at least 1600 pixels on the long side, while many application portals cap uploads at 1920. Email is another classic case — see our guide on reducing image size for email for the full workflow.

Upscaling: possible, but honest

You can enter dimensions larger than the original and the tool will oblige with smooth interpolation, but no resizer can invent detail that was never captured. For small enlargements (up to roughly 150%) the result is usually acceptable; beyond that, expect softness. If you must upscale aggressively, resize first and then apply light sharpening in an editor.

Format and quality

The download keeps your original format: JPEG and WebP stay lossy with an adjustable quality slider, while PNG output stays lossless. The resulting file size is shown before you download, so there are no surprises.