Image Resizer

Resize images by pixels or percentage, with optional aspect-ratio lock.

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How to use Image Resizer

Three quick steps — no sign-up needed

  1. Step 1

    Upload your image

    Drag and drop your image into Image Resizer, or click to browse.

  2. Step 2

    Choose dimensions

    Set width and height in pixels or a percentage, with optional aspect-ratio lock.

  3. Step 3

    Download

    Download your resized image at the exact size you need.

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About Image Resizer

Image Resizer is a free online tool that lets you resize images by pixels or percentage, with optional aspect-ratio lock — straight from your browser, with no software to install, no sign-up, and no watermarks. It runs on Windows, Mac, Linux, Android, and iOS, so you can use it on whatever device you happen to have to hand.

Whether you need an exact pixel size for a website, a profile picture, a printout, or a social post, Image Resizer gives you precise control. Set the width and height directly or scale by percentage, lock the aspect ratio to avoid distortion, and preview the result before you download. Files and data are processed securely and removed automatically afterwards, and many steps run entirely on your own device for extra privacy. Because Image Resizer is completely free and unlimited, you can use it as often as you need for work, study, or personal projects.

Benefits of Image Resizer

Pixel-perfect dimensions Set an exact width and height, or scale by percentage — you stay in control.
Aspect-ratio lock Keep proportions intact so your image never looks stretched or squashed.
Ready-made presets Resize for social profiles, thumbnails and banners without guessing the numbers.
No quality loss High-quality resampling keeps edges crisp at any size.

Frequently asked questions

How do I resize an image without losing quality?

Upload your image to Image Resizer, enter your target width and height (or a percentage), and keep aspect-ratio lock on. The tool resamples at high quality so edges stay crisp.

Can I resize an image by percentage?

Yes. Switch to percentage mode and enter a value like 50% to scale the image down (or above 100% to enlarge it) while keeping the proportions.

What image size should I use for social media?

Common targets are 1080×1080 for square posts, 1080×1920 for stories and 1200×630 for link previews. Enter the exact pixels you need and download.

Does resizing an image reduce its file size?

Usually yes — fewer pixels means a smaller file. If you mainly want a smaller file at the same dimensions, use an image compressor instead.