Image Resizer
Resize images to exact dimensions, percentages or max-width rules.
How to use this tool
- Drop an image.
- Choose resize mode: width, height, both, percent, or max-width.
- Optionally set output format and quality.
- Download the resized image.
How it works
Canvas draws the image at computed dimensions with image-smoothing enabled for quality; toBlob saves the result.
Tips
- For printing, resize up is pointless — you can't invent detail.
- Keep the longest edge under 2048 px for most uses.
Limitations
Upscaling adds no real detail; it only increases pixel dimensions.
Frequently asked questions
Can I set one dimension and keep the ratio?
Yes — entering only width (or only height) scales the other side proportionally.
What is the max-width mode?
It downscales only when the image is larger, perfect for email or site thumbnails.
Is quality maintained?
The canvas resamples with high-quality filtering; choose the output quality for JPG/WebP.