Free Online Image Resizer

Q: How do I lock or unlock aspect ratio when resizing images?

Simply click the Aspect Ratio Lock toggle button (chain icon). When locked (blue icon), modifying the width automatically updates the height proportionally (and vice versa). When unlocked, you can change width and height independently.

Q: Can I resize multiple images at the same time?

Yes! Our batch image resizer allows you to select or drag & drop multiple files, apply custom dimension or percentage settings to all images, and download them individually or as a single ZIP archive.

Q: Will resizing images reduce image quality?

Our tool uses HTML5 Canvas high-quality sampling to ensure your images stay sharp when resizing down or scaling up. You can also adjust the quality slider before exporting.

Q: Are my images uploaded to any server?

No. All image resizing operations are performed 100% locally within your browser. Your images never leave your computer or mobile device.

Resize JPG, PNG, WebP, GIF, and BMP images in pixels or percentage. Toggle Aspect Ratio Lock to maintain perfect proportions or stretch freely.

Aspect Ratio Lock Percentage Scaling 100% Client-Side Batch ZIP Export

Drop images here or Browse Files

Supports JPG, PNG, WebP, GIF, and BMP format images up to 50MB per file.

Global Resize Settings

Apply custom dimensions or percentage scaling across all images

Width (px)

Height (px)

Target Format

Preset Aspect Ratios

Image Export Quality: 90%

How to Resize Images with Aspect Ratio Lock

Upload Images

Choose or drag & drop single or batch image files into the workspace.

Set Dimensions & Lock Ratio

Enter exact width/height in pixels or scale by percentage. Toggle the Lock icon to maintain original proportions.

Resize & Download

Click 'Resize All' and download resized photos individually or as a single ZIP archive.

Frequently Asked Questions

How do I lock or unlock aspect ratio when resizing images?

Can I resize multiple images at the same time?

Will resizing images reduce image quality?

Are my images uploaded to any server?

Need to Convert Formats Too?

Try our free online converter to transform JPG, PNG, WebP, GIF, and SVG files.

Go to Image Converter