How to use Image Resizer
- Upload an image.
- Enter width and height in pixels, or choose a percentage scale.
- Keep aspect ratio locked if you want proportional resizing.
- Download the resized image.
Worked examples
Concrete numbers and cases you can check against the tool above.
LinkedIn-style 400×400 avatar
Start with a photo whose subject is centered. Set width and height to 400 and keep aspect ratio unlocked only if you will crop separately; otherwise lock ratio and resize the shortest side to 400, then crop. Upsizing a 200×200 image to 800×800 cannot invent detail — it only blurs.
When to use Image Resizer
Exact dimensions matter for avatars, ad slots, thumbnails, and print specs. Resizing in-browser avoids round-trips to cloud editors and keeps originals on your device until you download the result.
Common use cases
- Create 1:1 profile photos for apps that reject oversized uploads.
- Downscale camera photos for slideshows that stutter on large files.
- Match banner pixel sizes required by ad networks or newsletter tools.
- Scale screenshots to a consistent width for documentation sites.
Inputs and outputs
- Input: PNG, JPEG/JPG, WebP, and other common image formats
- Output: Resized image download (browser-supported format)
Privacy
Files are processed locally in your browser and are never uploaded. Close the tab when you are done and nothing is retained on our side.
Frequently asked questions
- Can I resize without stretching?
- Yes. Keep the aspect ratio locked so width and height scale together.
- Does upsizing improve quality?
- No. Enlarging adds pixels by interpolation and cannot restore detail that was never there.
- Is there a size limit?
- Limits depend on your browser and device memory. Very large images may be slow or fail on low-memory devices.