Resize Images Online
Resize images to exact dimensions online.
What is the Image Resizer?
Resizing images is a common requirement when you need to match specific dimensions for passport photo uploads, university portals, or web optimization.
This image resizer allows you to change image dimensions dynamically by setting width and height in pixels or scale by percentage. Processing runs locally in your browser to maintain photo privacy.
How to Use the Image Resizer
- Upload the PNG, JPG, or WebP photo you want to resize.:
- Input your target width and height in pixels, or use the percentage slider.:
- Toggle aspect ratio lock to prevent image stretching or distortion.:
- Click 'Resize Image' and download the resized file to your device.:
Benefits & Features
No Image Uploads: Your personal photos remain on your computer, ensuring absolute privacy.
Aspect Ratio Lock: Automatically scales height when you change width to preserve image proportions.
Format Preservation: Save the resized output in your choice of JPG, PNG, or original format.
Completely Free: Unlimited resizing operations with no registration gates.
⚠️ Common Mistakes to Avoid
- Unlocking aspect ratio lock when you don't want to distort the image features.
- Resizing very low-resolution icons to large print dimensions.
💡 Pro Tips for Students
- Use the percentage slider for quick scaling when you don't need exact pixel boundaries.
- Check target portal guidelines for specific dimension requirements before resizing.
Frequently Asked Questions
Will resizing reduce image quality?▼
Scaling down reduces file size with minimal quality loss. Scaling up significantly may introduce pixelation depending on the original quality.
Is the online resizer safe to use?▼
Yes. All image transformations are executed locally in your browser session using standard canvas APIs.
Which formats are supported?▼
We support PNG, JPG, JPEG, and WebP formats.
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This tool and its documentation were last reviewed and updated on July 16, 2026 by the StudyToolkit editorial team. We regularly verify our calculators, converters, and guides for accuracy.