Image

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Image Resizer

Resize images to exact dimensions or percentage

Drop an image here or browse

JPEG, PNG, WebP, GIF, BMP

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What is Image Resizer?

Free online image resizer to resize any image to exact pixel dimensions, scale by percentage, or choose from common presets like 1920x1080, 1280x720, and more.

Resize a photo for the web, shrink an image to a profile picture size, or set a custom width and height for a social post. Lock the aspect ratio to prevent distortion, preview the result in real time, and download in PNG or JPEG with adjustable quality. All processing happens entirely in your browser - your images are never uploaded to any server. No signup required.

How to Use Image Resizer

1Upload an image by clicking the upload area or dragging and dropping a file
2Choose a resize mode: Dimensions (exact pixels), Percentage (scale factor), or Preset (common sizes)
3Adjust width and height - toggle 'Lock aspect ratio' to keep proportions
4Select output format (PNG or JPEG) and adjust quality if using JPEG
5Preview the result and click 'Download' to save the resized image

Frequently Asked Questions

How does the Image Resizer work?

The tool uses the HTML5 Canvas API to resize your image entirely in the browser. When you set new dimensions, the image is redrawn onto a canvas at the target size and then exported as a PNG or JPEG file. No server upload is involved.

What resize modes are available?

Three modes are available: Dimensions mode lets you enter exact pixel width and height; Percentage mode scales the image by a factor (e.g. 50% halves both dimensions); Preset mode offers common resolutions like 1920x1080, 1280x720, 800x600, and icon sizes like 256x256, 128x128, and 64x64.

Does resizing affect image quality?

Downscaling (making an image smaller) generally looks fine. Upscaling (making it larger) can introduce blurriness since new pixel data must be interpolated. For JPEG output, the quality slider lets you balance file size against visual fidelity.

Are my images uploaded to a server?

No. All resizing runs entirely in your browser using JavaScript. Your images never leave your device, making this tool safe for sensitive or private photos.

How do I resize an image to 1080x1080 for a social post?

Switch to Dimensions mode, turn off Lock aspect ratio if your source is not already square, and enter 1080 for both width and height. Preview the result and download. If you want to keep the proportions instead, leave the lock on and the tool fills the matching dimension automatically.

Will resizing keep the image quality?

Making an image smaller keeps it sharp. Enlarging it past its original size interpolates new pixels and can look soft. For JPEG output the quality slider lets you trade file size against fidelity, so lower it for a lighter file or raise it to keep detail.

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Keep reading: TypeScript Cheat Sheet and image and canvas sizes reference. Doing this in code instead? See the utility endpoints.