Image Tools
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Instant Result
Image Resizer
Resize image dimensions by exact pixels or percentage while maintaining aspect ratio.
Initializing Image Resizer...
How to Use the Image Resizer
1. Upload your image.
2. Enter target width or height (or scale percentage).
3. Toggle Lock Aspect Ratio if desired.
4. Preview and download resized image.
2. Enter target width or height (or scale percentage).
3. Toggle Lock Aspect Ratio if desired.
4. Preview and download resized image.
Algorithm & Formula Details
Bilinear Canvas Scaling: target_canvas.drawImage(source_img, 0, 0, target_w, target_h).
All mathematical calculations, text transformations, and cryptographic hashes are executed strictly in memory inside your browser using modern Web APIs.
Frequently Asked Questions
Downscaling maintains crispness; upscaling above native resolution will interpolate pixels.