Resize images to exact pixel dimensions or scale by percentage. Maintain aspect ratio automatically. Works with JPG, PNG, WebP — instantly in your browser with no signup needed.
Click to upload or drag & drop image
JPG, PNG, WebP, GIF supported
Our free online image resizer lets you resize JPG, PNG, WebP, and GIF images to exact pixel dimensions or scale them by percentage. Whether you need specific social media image sizes, thumbnails for your blog, or custom dimensions for web design, this tool handles everything instantly in your browser.
SEO Best Practice: Always specify width and height attributes in HTML img tags. Correct image dimensions prevent Cumulative Layout Shift (CLS) — a Core Web Vitals metric that Google uses as a ranking signal.
Pixel mode lets you set exact dimensions. Enable aspect ratio lock to prevent distortion — the tool automatically calculates the other dimension to maintain proportions.
Percentage mode scales the image relative to its original size. Setting 50% halves both dimensions. Setting 200% doubles them. Perfect for quick size adjustments without calculating pixels manually.
Also try: Image Compressor — Image Converter — All Free Tools