Image Resizer
Resize an image to exact pixel dimensions or by percentage.
Processed on your device — never uploaded
Enlarging past the original size will look soft — pixels have to be invented.
What Is This Tool?
This tool draws your image onto a canvas at a new size using the browser’s smooth (bilinear) scaling. Lock the aspect ratio and change one dimension to have the other follow, or unlock it to stretch to an exact box. You can also pick a percentage scale and an output format.
How It Works
Drop an image onto the box or select one.
Type a new Width or Height, or choose a percentage.
Keep Lock aspect ratio on to avoid distortion.
Pick a format and click Download resized.
Everything runs locally in your browser — the image you choose is decoded onto an HTML canvas on your own device and is never uploaded to a server.
Features
- Exact pixel dimensions or percentage scaling
- Aspect-ratio lock to prevent stretching
- Smooth high-quality downscaling
- PNG, JPEG or WebP output
- Runs fully in the browser
Common Use Cases
- Fitting an image to a CMS’s required dimensions
- Making a thumbnail from a full-size photo
- Reducing a huge camera image to a web-friendly size
- Matching two images to the same width for a layout
Frequently Asked Questions
Will resizing lose quality?
Downscaling is generally clean. Upscaling beyond the original resolution always looks softer because the extra pixels are interpolated, not real detail.
How do I keep the proportions?
Leave "Lock aspect ratio" ticked and change only one dimension; the other adjusts automatically so the image is not stretched.
Does it change the file size too?
Yes — fewer pixels means a smaller file. Combine with the Image Compressor if you also want to lower the quality.
Can I resize to a size larger than my screen?
Yes. The output dimensions are independent of your display; the preview is just scaled to fit.
Is my image uploaded?
No. Resizing happens on a canvas in your browser.