Resize Images Online
Our free image resizer lets you change image dimensions and file size instantly. Perfect for web optimization, social media, email attachments, or any project requiring specific image sizes.
How to Resize Images
- Upload: Click to upload your image (JPG, PNG, GIF, WebP)
- Set Dimensions: Enter desired width and height in pixels
- Maintain Aspect Ratio: Keep proportions or customize freely
- Adjust Quality: Balance file size vs image quality
- Download: Save your resized image instantly
Common Image Sizes
- Social Media:
- Instagram Post: 1080 × 1080 px (square)
- Facebook Cover: 820 × 312 px
- Twitter Header: 1500 × 500 px
- LinkedIn Banner: 1584 × 396 px
- YouTube Thumbnail: 1280 × 720 px
- Web Images:
- Full Width Hero: 1920 × 1080 px
- Blog Featured: 1200 × 630 px
- Thumbnail: 300 × 300 px
- Print:
- 4×6 Photo: 1200 × 1800 px (300 DPI)
- 8×10 Photo: 2400 × 3000 px (300 DPI)
Why Resize Images?
- Website Performance: Smaller images load faster, improving SEO
- Storage Space: Reduce file sizes to save disk space
- Email Attachments: Meet email size limits
- Social Media: Match platform requirements
- Bandwidth: Reduce data usage for mobile users
Image Quality vs File Size
The quality slider controls JPEG compression. Higher quality (90-100%) preserves detail but creates larger files. Lower quality (60-80%) significantly reduces file size with minimal visible loss. For web use, 80-90% is usually optimal.
Aspect Ratio Tips
- Maintain Aspect Ratio ON: Prevents distortion, crops or letterboxes
- Maintain Aspect Ratio OFF: Stretches to exact dimensions, may distort
- Common Ratios: 16:9 (widescreen), 4:3 (standard), 1:1 (square), 3:2 (photo)
Best Practices
- Start with highest resolution available source images
- Use PNG for graphics with transparency or sharp edges
- Use JPEG for photographs and complex images
- Consider WebP format for modern browsers (better compression)
- Always preview before downloading
- Keep original files as backups
Image Optimization Tips
- Responsive Images: Create multiple sizes for different devices
- Lazy Loading: Load images only when needed
- CDN: Use Content Delivery Networks for faster serving
- Compression Tools: Further optimize with TinyPNG, ImageOptim
- Next-Gen Formats: Use WebP, AVIF for better compression
Privacy and Security
100% Private: All image processing happens locally in your browser. Images are never uploaded to any server. Your photos remain completely private and secure.