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Image Resizer

Resize any image to exact pixel dimensions in your browser

Privacy: your files never leave your device. All processing happens locally in your browser.

How to use

  1. 1.Pick an image — its original dimensions load automatically.
  2. 2.Type the width or height you need; the aspect-ratio lock keeps proportions.
  3. 3.Choose PNG, JPEG or WebP and download the resized image.

About Image Resizer

An image resizer changes the pixel dimensions of a picture — the width and height it is stored and displayed at. Unlike compression, which keeps the dimensions and squeezes file size through re-encoding, resizing changes how many pixels the image actually contains. The two work best together: scale a photo down to the size you really need, then let the format's encoder do the rest, and a multi-megabyte camera shot becomes a lean, fast-loading web image. This resizer runs entirely in your browser. Your image is decoded on your device, redrawn onto an HTML5 canvas at the new dimensions with high-quality smoothing, and re-encoded as PNG, JPEG or WebP. Nothing is uploaded to a server, there is no processing queue, and the original file on your disk is never touched — you always download a new copy. The everyday reasons to resize are surprisingly consistent: profile pictures and avatars that must be an exact square, social media covers and thumbnails with fixed dimensions, marketplace listings and application forms that reject anything over a pixel limit, email signatures, and web pages where an oversized image wastes bandwidth and drags down Core Web Vitals. In all of these cases the site will otherwise scale your picture for you — usually badly. Doing it yourself keeps the result sharp and predictable. The aspect-ratio lock keeps proportions intact: type a new width and the height follows automatically, so photos never come out stretched or squashed. Untick the lock only when you deliberately need to fit a fixed frame, and expect some distortion when the shape changes. Choosing an output format is simple. PNG is lossless and preserves transparency, which makes it right for logos, icons and screenshots with text. JPEG is the universal choice for photographs and produces small files at 80–90% quality. WebP usually beats JPEG by 20–30% at the same visual quality and is supported by every modern browser, so it is the best pick for images headed to your own website. One honest caveat: enlarging an image beyond its original dimensions cannot invent detail that the camera never captured. Modest upscaling looks fine for backgrounds and print previews, but expect softness when you push far past the source size. Downscaling, on the other hand, is essentially free — a high-resolution original resized down stays crisp. Because everything happens locally, this tool is also the private option: ID photos, documents and unreleased design work never travel over the network. Pick a file, type the dimensions, and download the result — the preview updates in real time as you change the numbers.

Frequently asked questions

Does resizing reduce image quality?
Scaling down keeps images crisp — this tool uses high-quality smoothing when redrawing. Enlarging past the original size cannot add detail the camera never captured, so expect some softness when upscaling.
Are my photos uploaded to a server?
No. The whole resize happens locally in your browser using the HTML5 canvas. Your files never leave your device.
How do I resize an image without stretching it?
Keep "Lock aspect ratio" ticked. Enter the width you need and the height adjusts automatically, so the picture keeps its original proportions.

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