Image Resizer
Resize images by exact dimensions or percentage with aspect ratio lock and client-side format conversion.
Select Image to Resize
Upload a JPG, PNG, or WebP image to adjust dimensions with exact pixel or percentage scaling.
JPG, PNG, WebP • Max 20 MB
Client-Side Image Resizing
Resize image dimensions without uploading files to remote servers. All calculations and canvas operations execute on your device.
Maintains original proportions to prevent stretching or distortion.
Guaranteed positive integer pixel dimensions capped at 10,000 px.
Privacy: Your image is processed locally in your browser. OfficeKit does not upload or store the image you select in this tool.
Review Notice: Verify output aspect ratio, pixel dimensions, and image sharpness before use.
Image Resizing Standards & Dimension Rules
Maintain crisp aspect ratios and safe pixel allocations across modern display densities.
Proportional Scaling
When aspect ratio lock is enabled, updating width or height automatically recalculates the other dimension using exact integer rounding to prevent pixel distortion.
Canvas Safety Guards
Dimensions are guarded between 1 px and 10,000 px to prevent memory exhaustion and browser tab crashes during canvas buffer allocation.
Client-Side Bicubic Resampling
Browser Canvas imageSmoothingQuality is configured to high quality resampling, ensuring sharp text and clear graphics after downscaling or enlargement.