Free • Fast • Privacy-first

Image Resizer

Resize images to specific dimensions or maintain aspect ratio. Free online image resizer that works 100% in your browser.

⚡ Resize Image How it works

Processing: Client-Side
Speed: On your device
Privacy: Local files
Price: Free

Resize Image online

Upload an image and resize it to your desired dimensions.

Upload Image

What this tool does

Change image dimensions and download a PNG. Lock the aspect ratio to preserve proportions, or set both dimensions to stretch the image.

Need scalable SVG paths for a logo or icon? Try PNG/JPG to SVG (VTracer). Tracing approximates the artwork; inspect small text and fine details before using the result.

Output: PNG, regardless of the original filename or input format.
Aspect ratio: The lock recalculates the other dimension. Presets turn the lock off and can stretch an image.
Cropping: No cropping occurs: the whole image is scaled into the chosen dimensions.
Processing and price: Free, one image at a time, processed in your browser. Large pixel dimensions can exceed device memory.

How to use it

Choose an image and check its original dimensions.
Keep the aspect-ratio lock on, then change the width or height.
Check the preview and download the PNG. Use the format converter if you need JPEG or WebP.

Try a reproducible example

The sample is 800 × 600 pixels (4:3). Set width to 400 with the lock on to get 400 × 300. Setting 400 × 400 with the lock off stretches it into a square; it does not crop the sides.

Download sample PNG (800 × 600)

Synthetic test pattern with transparent areas. No personal photos or documents.

Can enlarging recover detail?

No. Enlarging adds interpolated pixels; it cannot recover detail that was absent from the original.

Why can the resized file be larger?

This tool exports PNG. A smaller PNG image can still use more bytes than the original compressed JPEG or WebP. Compare dimensions and file size separately.

Technical reference: browser canvas export behavior. Privacy details.