Resize Image in Pixels Online Free
Set the exact width and height in pixels. The aspect-ratio lock keeps your photo from stretching.
or drag & drop your image here
Why resize to exact pixels?
Different places need different image dimensions: a blog post might want 1200px-wide images, a video thumbnail 1920×1080, and a profile picture 300×300. This free tool resizes your photo to any exact width and height, with the aspect ratio locked by default so nothing gets stretched.
Enter the two numbers you need — or change just one and let the lock fill in the other — and the tool redraws your image with high-quality smoothing. Shrinking keeps photos sharp, and the download is ready instantly.
All processing happens locally in your browser, so your photo is never uploaded. Try Resize by Percentage or Resize to 100KB.
How to resize an image in pixels
Upload your image
Click "Choose Image" or drag and drop your photo. It stays on your device the whole time.
Enter pixel dimensions
Type the width and height you need, or change just one value and let the aspect-ratio lock fill in the other.
Download
Your image is redrawn at the new size. Click Download to save it as JPG, PNG or WEBP.
Why choose this pixel resizer?
Exact dimensions
Set any width and height; the aspect-ratio lock prevents stretching.
Sharp scaling
High-quality smoothing keeps shrunk photos crisp.
Private by Design
Images never leave your device — processed 100% in your browser.
100% Free
No signup, no watermarks, no limits. Use it as much as you need.
Frequently Asked Questions
What is the difference between pixels and KB?
Pixels measure the image's width and height, like 1920×1080. KB measures the file size on disk. Smaller pixel dimensions usually mean a smaller file, but compression also matters — which is why resize-to-KB tools adjust both.
What does resizing an image in pixels mean?
It changes the width and height of the image measured in pixels — for example from 4000×3000 to 800×600. The tool redraws the photo at the new dimensions with high-quality smoothing.
Will resizing change the image quality?
Shrinking an image usually looks fine and can even appear sharper. Enlarging a small image makes it blurry because there are no extra pixels to add. For best results, keep the aspect ratio locked.
What is the aspect ratio?
The aspect ratio is the width divided by the height (like 4:3 or 16:9). Locking it keeps your photo from looking stretched or squashed when you change one dimension.
What are common sizes in pixels?
Common sizes include 1920×1080 (Full HD), 1200×630 (social share images), 800×600, 640×480 and 300×300. The right size depends on where the image will be used.
Does resizing change the file size in KB?
Usually yes — smaller dimensions produce a smaller file. To hit an exact KB value, use a resize-to-KB tool instead, which balances size and quality automatically.