Image Resizer
Resize your images to specific dimensions or percentage without quality loss.
Drag & drop images
or click to browse (max 5MB each)
Professional Image Resizing Features
Built for developers, designers, and content creators who need speed and accuracy.
Lightning Fast Resizing
Resize high-resolution formats instantly using WebAssembly technology. No upload waiting times, no server queues.
Precision Control
Scale by exact pixel dimensions or by percentage. Maintain total control over your output resolution.
100% Client-Side Secure
Your sensitive photos never leave your device. All processing happens in your browser's trusted sandbox environment.
Smart Quality Preservation
Advanced resampling algorithms (Lanczos3, Bicubic) ensure your images stay sharp even when changing dimensions significantly.
Web Optimization
Create perfectly sized images for websites, blogs, and e-commerce stores to improve page load speeds and SEO.
Social Ready
Quickly adapt your visual content for Instagram, TikTok, LinkedIn, and other social platforms without guessing the right size.
Image Resizing Best Practices
Expert tips to ensure your resized images look sharp and perform well everywhere.
Downscaling vs. Upscaling
Downscaling (making an image smaller) is generally safe and retains quality. Upscaling (making it larger) often introduces "pixelation" or blurriness because new data has to be invented. Always try to start with a high-resolution source.
Lock Aspect Ratio
Unless you specifically need to stretch or squash an image, always keep the aspect ratio locked. This ensures your subjects don't look unnaturally wide or tall when changing dimensions.
Pixels Matter, Not DPI
For web and digital use, pixel dimensions (e.g., 1920x1080) are what matter. DPI/PPI settings are metadata used primarily for print. A 1000px image looks the same on a screen whether it is 72 DPI or 300 DPI.
Format Selection
After resizing, choose the right format. PNG is best for graphics with text or transparent backgrounds. JPG is efficient for photographs. WebP offers the best balance of quality and file size for the modern web.
How to Resize Images in 4 Steps
A quick guide to changing image dimensions without special software.
Upload Image
Drag & drop your photo into the tool, or click to browse your files. We support high-resolution JPG, PNG, and WebP files.
Choose New Dimensions
Enter your target width or height in pixels, or use the percentage slider to scale the image relative to its original size.
Review Settings
Ensure 'Maintain Aspect Ratio' is checked if you want to avoid distortion. The tool automatically calculates the matching dimension.
Resize & Download
Hit the 'Resize Image' button. Your processed image will be ready instantly for download in your preferred format.
Frequently Asked Questions
Common questions about changing image dimensions.