Resize Image Online — Change Dimensions for Free
Resize your images to any dimension with NanoImage's free online resizer. Change width and height by exact pixels or by percentage — with an option to lock the aspect ratio to prevent stretching or distortion. Choose from popular preset sizes like 1920×1080, 1280×720, 800×600, or enter your own custom dimensions. You can also scale images by percentage: 25%, 50%, 75%, or 200%. Ideal for preparing images for websites, social media, email, presentations, and more. All processing happens locally in your browser for instant results.
Drag & drop your image here, or click to browse
Supports JPG, PNG, WebP, GIF, BMP
How to Use
- 1
Upload your image by dragging it into the upload area or clicking to browse.
- 2
Enter new width and height in pixels, choose a percentage, or select a preset size. Toggle aspect ratio lock as needed.
- 3
Click "Resize" and download your resized image.
Frequently Asked Questions
Will resizing make my image blurry?
Downsizing (making smaller) generally maintains clarity. Upsizing (making larger) may introduce some softness, as the tool needs to interpolate new pixels.
What does 'Lock Aspect Ratio' mean?
When locked, changing the width automatically adjusts the height (and vice versa) to maintain the original proportions, preventing distortion.
What preset sizes are available?
We offer common sizes: 1920×1080 (Full HD), 1280×720 (HD), 800×600, 640×480, and percentage-based scaling at 25%, 50%, 75%, and 200%.
Can I resize images without losing quality?
Downsizing preserves quality well since pixels are merged. Upsizing may introduce slight softness as new pixels must be interpolated. For best results when enlarging, use moderate scaling (up to 200%).