Image Resizer
Resize images to custom dimensions with aspect ratio lock. Supports PNG, JPEG, and WebP.
How to Use
- Upload an image by dragging it onto the dropzone or clicking to browse.
- Enter the target width and height in pixels. Use the chain icon to lock or unlock the aspect ratio.
- Use the quick-scale buttons (50%, 25%, 2x) for common resize ratios, or click Original to reset.
- Optionally choose a different output format, then click "Resize Image".
- Preview the result and download the resized image.
About This Tool
Resize images to custom dimensions with aspect ratio lock. Supports PNG, JPEG, and WebP.
This tool processes everything locally in your browser. Your files and data never leave your device. No uploads, no tracking, no accounts required.
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Image Resizer Guide
Resize images to exact pixel dimensions with optional aspect ratio locking. The resizer uses the HTML5 Canvas API to scale images smoothly in your browser, supporting PNG, JPEG, and WebP formats. Use the quick-scale buttons for common ratios or enter custom dimensions manually.
When to resize:
- Web optimization: Reduce large photos to fit layout constraints before uploading.
- Social media: Match recommended dimensions for profile pictures, banners, and posts.
- Print preparation: Scale images to specific print resolutions.
Frequently Asked Questions
Downscaling generally preserves quality well. Upscaling (enlarging) may result in pixelation since the resizer uses standard bilinear interpolation.
Yes. You can keep the original format or convert to JPEG, PNG, or WebP during the resize operation.