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Image Resizer

Resize images to exact dimensions or by percentage. Maintain aspect ratio, choose output format, and download the resized image instantly.

Upload Image

Drag & drop an image here, or click to select

Supports JPEG, PNG, WebP, GIF, BMP

Upload an image to see the resized result here.

About Image Resizer

Image Resizer is a free online tool that lets you resize images to specific dimensions or scale them by percentage. You can enter exact pixel values for width and height, or use preset percentages like 50%, 75%, 150%, and 200%.

The aspect ratio lock ensures your images are never distorted. All processing happens in your browser using the Canvas API — your images are never uploaded to any server, keeping your data completely private.

How to Use

Upload an image — Drag and drop an image onto the upload area, or click to select a file from your device.
Set dimensions — Enter the target width and height in pixels, or switch to percentage mode and select a preset scale.
Keep aspect ratio — Toggle the lock to maintain proportions when changing one dimension (enabled by default).
Choose output format — Select JPEG, PNG, or WebP as the output format.
Download — Click the Resize & Download button to save the resized image.

Frequently Asked Questions

Q: Does resizing reduce image quality?

Upscaling (making an image larger) can reduce quality because the browser must interpolate new pixels. Downscaling generally preserves quality well. For best results, avoid scaling images larger than their original dimensions.

Q: What is aspect ratio lock?

Aspect ratio lock automatically calculates the other dimension when you change width or height, maintaining the original proportions of the image. This prevents distortion (stretching or squishing).

Q: What is the maximum image size supported?

There is no strict file size limit, but very large images may take longer to process since all resizing happens in your browser. For best performance, we recommend images under 50MB.

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