What Is Image Resizer?
A free online image resizer. Upload any image and resize it to custom dimensions or by percentage scale. Lock aspect ratio for proportional resizing. Uses the Canvas API for high-quality output. All processing happens locally.
Why Use Image Resizer?
- Custom width and height in pixels
- Lock aspect ratio option
- Scale by percentage (10%-200%)
- Canvas API for high-quality output
How to Use Image Resizer — Step by Step
1
Upload or drag-and-drop an image.
2
Set target width and/or height.
3
Toggle "lock aspect ratio" if needed.
4
Download the resized image.
Who Is Image Resizer Best For?
- web optimization
- social media
- thumbnails
- email images
Image Resizer — Frequently Asked Questions
Will resizing reduce quality?
Downscaling generally preserves quality well. Upscaling (enlarging) beyond 200% may cause noticeable pixelation. The Canvas API uses bilinear interpolation for best results.
What is aspect ratio locking?
When locked, changing width automatically adjusts height (and vice versa) to maintain the original proportions. This prevents distortion of the image.
Ready to Use Image Resizer?
Free online tool — works in your browser, no sign-up required. Start using it right now.
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