Image Resizer
Resize an image by exact pixel dimensions or by percentage — processed locally in your browser, never uploaded.
Drag & drop an image here
or browse your files — PNG, JPG, or WebP
How the image resizer works
This tool reads the image you select using your browser's native image decoder, draws it onto an HTML5 <canvas> element at your chosen dimensions, and then exports the result back to a downloadable file — all without a single byte leaving your device. There's no server component involved at any step.
You can resize by typing exact pixel dimensions (useful for meeting a platform's upload requirements) or by percentage (useful for quickly scaling something down or up proportionally). The aspect ratio lock keeps your image from looking stretched or squished when you only change one dimension.
Common resize use cases
- Shrinking a photo to fit a website's maximum upload dimensions
- Preparing a profile picture or thumbnail at an exact pixel size
- Scaling a screenshot down before sharing it in a document or email
- Enlarging a small image for a presentation slide (note: enlarging beyond the original resolution can reduce sharpness)
Frequently asked questions
Will resizing reduce image quality?
Shrinking an image generally preserves good quality. Enlarging an image beyond its original pixel dimensions can make it look softer or blurry, since no new detail is created — it's simply stretched.
Does this upload my photo anywhere?
No. The resize happens entirely in your browser using the Canvas API. Your image is never sent to a server.
What format will my resized image be saved as?
The output keeps the same format as your original file (PNG, JPG, or WebP). If you need to change the format as well, try the Image Converter.