Frequently Asked Questions
Find fast answers to common questions about resizing, target KB compression, privacy, and image formats.
An image resizer changes the physical dimensions (width and height in pixels) of an image. It scales the pixel matrix to fit specific display parameters (such as a 1200 × 630 px social share card, 800 × 800 px product image, or custom web banner) without cropping the visual area.
Upload your file on the homepage, select the "Resize Image" tab, enter your desired width or height, and click "Resize Image". With aspect ratio locking enabled, proportions stay intact automatically.
Select the "Compress to KB" tab after uploading your image. You can specify a target size (such as 100 KB) or use the quality slider. When you click "Compress Image", the tool calculates the optimal compression ratio to reduce byte weight while maintaining high visual clarity.
Yes. Quick preset buttons for 20 KB, 50 KB, 100 KB, 200 KB, 300 KB, 500 KB, and 1 MB are provided right above the action button. You can also type any custom numeric value directly into the target KB field.
No. Image Resizer & Compressor is 100% client-side. The image processing is handled locally by your browser's JavaScript and HTML5 Canvas engines. None of your photos, documents, or graphics are ever sent across the web or stored on our servers.
Yes. The website is free to use with no hidden fees, paid tiers, mandatory sign-ups, or usage limits.
We support all standard browser image types: JPG, JPEG, PNG, and WebP for input. You can also choose your preferred output format during export.
Lossy compression removes redundant frequency data that is generally invisible to the human eye. By fine-tuning the compression level, file size can be reduced by 70–90% with minimal discernible difference in visual appearance.
Yes. Use the "Resize + Compress" mode to scale your pixel dimensions and achieve a target file size in a single combined step.
File size depends on image resolution, entropy, and standard block encoding. If a very small target (e.g. 10 KB) is requested on a high-resolution image, quality reduction alone cannot breach mathematical limits without reducing dimensions. Enabling "Automatically reduce dimensions if needed" allows the engine to downscale dimensions until the target size is achieved.
Yes. Our website is mobile-friendly and touch-optimized, working seamlessly on all mobile browsers on Android and iOS.