Free Online Image Resizer
Resize any image to your desired width and height. Lock aspect ratio to prevent distortion.
How to Resize an Image
Upload any image, enter the desired width and height in pixels, and click Resize. Enable the Lock Aspect Ratio checkbox to keep proportions intact — changing one dimension will automatically adjust the other. Preview the result and download it instantly.
Common Use Cases
Resize images for social media profile photos, email signatures, thumbnails, blog headers, or e-commerce product listings. Each platform has recommended dimensions, and this tool lets you hit them precisely without installing any software.
Tips for Best Results
Scaling an image down preserves quality well. Scaling up beyond the original size may produce blurry results because new pixels are interpolated. For best quality when enlarging, try to keep the scale factor under 2×.
Frequently Asked Questions
Does resizing affect image quality?
Scaling down retains quality well. Scaling up beyond the original resolution can introduce blurriness since the browser must interpolate new pixels.
What does Lock Aspect Ratio do?
When enabled, changing the width automatically adjusts the height proportionally (and vice versa), preventing the image from being stretched or squished.
What output format is the resized image?
The resized image is downloaded as a PNG file, which preserves quality without compression artifacts.
Is there a maximum image size?
There is no enforced limit, but very large images may be slow on devices with limited memory.
Is my image sent to a server?
No. The entire resizing process runs locally in your browser using the HTML5 Canvas API. Nothing is uploaded.