About Resize Image Dimensions Online
Scale photo dimensions with pixel accuracy and optional aspect-ratio locking. PDFDock resizes images directly on local HTML5 canvas elements, allowing you to prepare photos for social media banners, website assets, and passport requirements safely.
How to Resize Image Dimensions Online
- Upload your target image file.
- Type new Target Width or Target Height values in pixels.
- Toggle 'Lock Aspect Ratio' to maintain proportions.
- Click 'Process Files' to render the resized canvas image.
- Download your scaled image file.
Frequently Asked Questions
Q.Does aspect ratio locking prevent stretching?▼
Yes. When aspect ratio lock is enabled, updating width calculates proportional height automatically.
Q.Is my original image overwritten?▼
No. PDFDock creates a brand new resized image file for download while your original file stays safe on your device.
Best Private Image Resizer — PDFDock
Scale images with precision without sending graphics to remote cloud servers.
| Feature | PDFDock | Others |
|---|---|---|
| File Upload Required | No — canvas rendering | Yes — cloud server processing |
| Privacy Protection | 100% private on device | Stored in cloud temp folder |
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Your Privacy is Guaranteed
Canvas resizing draws the image on adjusted grid bounds locally before generating the final blob.PDFDock operates 100% offline after the initial page load. We have no backend servers, no database, and no file storage. Your documents are processed entirely in your browser's memory and are never transmitted over the network. This makes PDFDock inherently compliant with GDPR, CCPA, HIPAA, and other global privacy regulations.