Image Resizer
Resize images instantly with our free online image resizer. Upload your image and choose from preset sizes for social media platforms, enter custom dimensions with aspect ratio lock, or scale by percentage. Adjust quality and convert between formats. All processing happens in your browser for complete privacy.
Upload an Image
Drag and drop your image here, or click to browse
Supported formats: PNG, JPG, WEBP, GIF (max 10MB)
Embed This Tool
Add this tool to your website with customizable styling
How to Use
- 1 Upload your image — Drag and drop an image file (PNG, JPG, WEBP, or GIF up to 10MB) or click to browse. Your image is processed locally in your browser.
- 2 Choose resize mode — Select Presets for social media sizes (Instagram, Facebook, Twitter, LinkedIn), Common Sizes for standard dimensions, Custom for specific width/height, or Percentage to scale proportionally.
- 3 Set dimensions or percentage — For Custom mode, enter width and height in pixels. Use the lock icon to maintain aspect ratio. For Percentage mode, use the slider (10-200%) to scale your image.
- 4 Adjust format and quality — Choose output format (PNG for transparency, JPG for photos, WEBP for modern browsers). Adjust quality slider (0.1-1.0) to balance file size and image quality. See estimated file size in real-time.
- 5 Preview and download — View before/after comparison with file sizes. Click Download to save your resized image with automatic filename. Use Reset to try different settings or New Image to start over.
💡 Pro Tip: For social media, use the preset sizes to ensure your images meet platform requirements. For web optimization, try WEBP format at 0.8 quality for the best balance of quality and file size. Always check the before/after preview to ensure quality meets your needs.
Frequently Asked Questions
What's the difference between PNG, JPG, and WEBP?
PNG is lossless (perfect quality, larger files) and supports transparency. JPG is lossy (smaller files, slight quality loss) best for photos. WEBP is modern format with better compression than JPG but not supported in older browsers. Choose PNG for graphics/logos, JPG for photos, WEBP for web optimization.
How does aspect ratio lock work?
When locked, changing width automatically adjusts height (or vice versa) to maintain the original image proportions. This prevents distortion and stretching. Unlock it if you need to crop or intentionally change the aspect ratio.
What quality setting should I use?
For JPG/WEBP: 0.9-1.0 for high quality (larger files), 0.7-0.8 for balanced quality/size (recommended for web), 0.5-0.6 for maximum compression (smaller files, visible quality loss). PNG quality doesn't affect file size much since it's lossless.
Are my images uploaded to a server?
No! All image processing happens entirely in your browser using the Canvas API. Your images never leave your device. This ensures complete privacy and faster processing since there's no upload/download to a server.