Resize images to exact pixel dimensions — with optional aspect ratio lock.
How to Resize an Image Online
Upload your image by dragging it onto the drop zone or clicking to select a file. Enter your target width and height in pixels. Enable "Lock aspect ratio" to prevent distortion. Click "Resize Image" to download the resized PNG.
Common Image Size Requirements
- Facebook cover photo: 820 × 312 px
- Twitter/X header: 1500 × 500 px
- Instagram post: 1080 × 1080 px
- LinkedIn profile photo: 400 × 400 px
- YouTube thumbnail: 1280 × 720 px
- Blog post featured image: 1200 × 628 px
- WhatsApp profile: 640 × 640 px
Frequently Asked Questions
Does image resizing reduce quality?
Resizing down (making smaller) retains quality well. Resizing up (enlarging) will reduce sharpness as no new pixel data is added.
Is my image uploaded to a server?
No. All resizing happens locally in your browser using the HTML5 Canvas API. Your image stays on your device.
What does 'Lock aspect ratio' do?
When enabled, changing the width automatically adjusts height (and vice versa) to maintain the original proportions, preventing distortion.
What format is the output?
The resized image downloads as a PNG file to preserve maximum quality.
Can I resize images for social media?
Yes! The tool accepts any dimensions. Use the common sizes listed in the guide above for different social media platforms.