Can I lock the aspect ratio when resizing?

Yes. Toggle the chain icon between the width and height inputs. When locked, changing one dimension updates the other to preserve proportions.

Does resizing reduce image quality?

Downscaling (making an image smaller) is effectively lossless in visible terms. Upscaling (making it larger) cannot add detail that isn't there, so it may appear soft.

What's a good size for web images?

For full-width hero images, 1920px wide is plenty. For in-line content images, 1200px is typically enough. Smaller dimensions mean smaller files and faster pages.

Are my images uploaded anywhere?

No. All resizing happens locally in your browser. Your files never leave your device.

What image formats are supported?

JPEG, PNG, WebP, and AVIF — the output keeps the same format as the input.

Free Image Resizer

Resize images online by width and height in pixels, with an optional aspect-ratio lock. Perfect for fitting images to Instagram, thumbnails, profile pictures, or web layouts. Everything runs in your browser — no uploads, no sign-up.

Drag & drop images here, or browse

Up to 20 files • Max 50 MB each

Resize Settings

Width (px)

Height (px)

Aspect ratio is locked — editing one side updates the other.

How to resize an image

1
Upload your image
Drag and drop your image, or click to browse. Width and height pre-fill from the original.
2
Enter target dimensions
Type new width and height values. Keep the aspect-ratio lock on to preserve proportions.
3
Resize
Click Resize. All processing runs locally in your browser.
4
Download
Download the resized image individually, or grab all results in one click.

Resize FAQ

Can I lock the aspect ratio when resizing?: Yes. Toggle the chain icon between the width and height inputs. When locked, changing one dimension updates the other to preserve proportions.
Does resizing reduce image quality?: Downscaling (making an image smaller) is effectively lossless in visible terms. Upscaling (making it larger) cannot add detail that isn't there, so it may appear soft.
What's a good size for web images?: For full-width hero images, 1920px wide is plenty. For in-line content images, 1200px is typically enough. Smaller dimensions mean smaller files and faster pages.
Are my images uploaded anywhere?: No. All resizing happens locally in your browser. Your files never leave your device.
What image formats are supported?: JPEG, PNG, WebP, and AVIF — the output keeps the same format as the input.