Image Resizer
Easily resize images by exact pixel dimensions or scale by percentage without sacrificing visual sharpness. All resizing calculations and canvas rendering happen locally in your browser for instant results and full privacy.
Click to choose files or drag and drop
Supported types: image/jpeg, image/png, image/webp, .jpg, .jpeg, .png, .webp (Max: 50 MB)
Resize Options
Choose to resize by percentage scale or explicit pixel dimensions
Pixel dimensions vs percentage scaling
Depending on your workflow, you might need an image scaled for an exact layout (e.g. 1200x630 for social share cards) or downscaled by a quick proportion (e.g. 50% for faster email attachments). FileKinetix lets you switch effortlessly between both modes. When entering pixel dimensions, the aspect ratio lock automatically recalculates matching dimensions so your photos never stretch or distort.
High-quality bicubic canvas resampling
Resizing images in the browser uses high-quality smoothing filters to produce clean, sharp outputs without aliasing or jagged pixel boundaries. Whether downscaling 4K camera photos to web banner sizes or adjusting illustration assets, the resulting image retains clean lines and accurate color gradation.
Privacy-first local processing
Unlike traditional photo editing tools that require uploading your photos to remote servers, FileKinetix works entirely within your browser memory. Your images remain on your computer or phone throughout the resizing process, making it safe for confidential documents, personal photos, and sensitive company assets.
How to resize images online
- Upload one or more JPG, PNG, or WEBP images by dragging them into the dropzone.
- Choose your resizing mode: 'By Percentage' (slider) or 'By Dimensions' (pixel width and height).
- Enable 'Maintain aspect ratio' to keep the original proportions and avoid stretching.
- Select your desired output format or keep 'Original'.
- Click 'Resize Images' to process your files locally.
- Download individual resized images or click 'Download all' to get a ZIP package.
Frequently Asked Questions
Does resizing distort my photos?
No. With 'Maintain aspect ratio' enabled (default), changing the width will automatically update the height proportionally (and vice-versa), ensuring no distortion.
Can I batch resize multiple images of different sizes?
Yes! In percentage mode, all images scale by the same relative percentage. In dimensions mode with aspect ratio lock enabled, each image is scaled proportionally to fit within the specified bounds without distortion.
Will resizing reduce file size?
Yes, reducing pixel dimensions directly reduces total pixel count and uncompressed memory, leading to significantly smaller file sizes in almost all cases.
Are my files uploaded anywhere?
Never. Everything runs locally in your browser. No files are uploaded to any server.
Can I convert format while resizing?
Yes, you can choose to output as WEBP, JPG, or PNG, or maintain the original image format.