Change image dimensions in pixels, percentage or preset social sizes.
Resize to exact pixels or a ready-made social media preset
The Image Resizer changes the pixel width and height of a photo while keeping the process entirely on your device. Whether you need a thumbnail for a product listing, a banner sized exactly for a social media platform, or a smaller copy of a photo for a presentation, this tool gives you precise control without needing design software.
When you resize an image here, the tool draws the original picture onto an HTML canvas at the new dimensions you specify, using high-quality smoothing so edges and gradients stay clean instead of turning blocky. You can type an exact width and height, use a percentage scale, lock the aspect ratio so the picture never looks stretched, or pick one of the built-in presets for common platforms such as Instagram posts, YouTube thumbnails or LinkedIn banners.
E-commerce sellers use the resizer to make every product photo in a catalogue the same consistent dimensions. Social media managers use it to fit images to the exact canvas each platform expects, avoiding awkward automatic cropping. Teachers and students resize scanned pages or diagrams so they fit neatly into slides and documents without distortion.
Enlarging a small image beyond its original size will make it look softer or blurry, because no new detail can be invented, only interpolated. If you plan to enlarge a photo significantly, try the Image Upscaler-style approach of resizing in smaller steps or starting from the highest-resolution source you have. Locking the aspect ratio is the safest option for portraits and product shots, since unlocking it can distort faces and logos noticeably.
Yes. Switch to the percentage tab and enter any value, for example 50 percent, and the tool calculates the new width and height automatically.
Usually yes, since fewer pixels generally means less data, but for precise control over file size use the dedicated Image Compressor after resizing.
You can set width and height independently, but the image may appear stretched or squeezed if the new ratio differs significantly from the original.
Yes, transparent areas are preserved through the resizing process as long as you export the result as PNG or WebP.
