Image Resizer
Resize images online for free. Set exact pixel dimensions with optional aspect ratio lock. Supports JPG, PNG, WebP, and more. Runs in your browser.
About Image Resizer
Resize images to exact pixel dimensions using our free online image resizer. Enter the target width and height in pixels, optionally lock the aspect ratio to prevent distortion, and download the resized image in your chosen output format. The tool uses Lanczos3 resampling, a high-quality downscaling algorithm that preserves sharpness better than bilinear or nearest-neighbour methods. Upload a single image to see a before/after comparison, or batch resize up to 20 images to the same target dimensions at once. All processing happens in your browser — no uploads, no server, complete privacy. The output format defaults to the same as the input but can be changed, allowing you to resize and convert in one step. Common use cases include resizing photos for social media profile images, creating thumbnails for e-commerce product listings, or reducing image dimensions before embedding in documents or presentations. All processing happens directly in your browser with no server involved.
Frequently Asked Questions
- What does "lock aspect ratio" do?
- When enabled, changing the width automatically updates the height (and vice versa) to maintain the original image proportions, preventing stretching.
- What resampling method is used?
- Lanczos3. It produces sharp, high-quality results and is the recommended algorithm for downscaling photographic images.
- Can I resize and convert format in one step?
- Yes. Choose a different output format from the selector and the image will be resized and converted in one operation.