Image Resizer
Resize images to custom dimensions
Image Resizer
How to Use
- Upload an image file (JPG, PNG, WebP, etc.)
- Enter new dimensions or use quick resize presets
- Toggle aspect ratio lock to maintain proportions
- Choose output format and quality
- Click Resize and download the result
Your Privacy is Protected
All processing happens entirely in your browser. No data is stored, transmitted, or tracked. Your information remains completely private and secure on your device.
About Image Resizer
Resize images to custom dimensions quickly and easily with our online image resizer tool. Whether you need to reduce file size for faster website loading, fit images to specific dimensions for social media, create thumbnails, or optimize photos for email, our resizer handles all image resizing needs with quality preservation options. Supports JPG, PNG, GIF, and WebP formats with instant browser-based processing - no uploads to servers, ensuring complete privacy. Perfect for web developers optimizing site performance, social media managers formatting content, photographers preparing images for different uses, and anyone needing quick image dimension changes. Features include aspect ratio locking to prevent distortion, quality control for file size optimization, batch resizing for multiple images, and instant preview before downloading. All processing happens in your browser for maximum speed and security.
Key Features
Multiple Format Support
Resize JPG, PNG, GIF, WebP, and other common image formats. Convert between formats while resizing for versatility.
Aspect Ratio Lock
Maintain original proportions automatically or manually set custom ratios. Prevents stretching and distortion for professional-looking results.
Quality Control
Adjust compression quality to balance file size and image quality. Optimize images for web without noticeable quality loss.
Preset Dimensions
Quick-select common sizes: social media formats, standard photo sizes, web-optimized dimensions. Save time with one-click presets.
Batch Processing
Resize multiple images at once with the same settings. Perfect for processing photo galleries or product catalogs.
Browser-Based Processing
All resizing happens in your browser. No uploads, no servers, complete privacy. Works offline after page loads.
How to Use Image Resizer
Upload Image
Click to upload or drag-and-drop your image file. Supports JPG, PNG, GIF, WebP, and other common image formats.
Enter Dimensions
Enter desired width and/or height in pixels. Input one dimension and the other calculates automatically if aspect ratio is locked.
Lock Aspect Ratio
Choose to lock aspect ratio (prevent distortion) or allow free resizing. Locking maintains image proportions for professional results.
Adjust Quality
Adjust the quality slider to balance file size vs. image quality. Higher quality means larger files but better-looking images.
Preview Result
Preview the resized image before downloading to ensure it meets your requirements and looks as expected.
Download Image
Download the resized image to your device. The file is optimized based on your quality settings.
Batch Process
For multiple images, upload a batch and apply the same resize settings to all images at once for efficiency.
Frequently Asked Questions
Will resizing reduce image quality?
Resizing down (making smaller) usually maintains quality well. Resizing up (making larger) reduces quality and sharpness - you can't add detail that isn't there. Use quality slider to control compression. Higher quality = better image but larger file size.
What's the difference between resizing and cropping?
Resizing changes dimensions while keeping all content (may distort if not maintaining aspect ratio). Cropping cuts portions of the image to change size or aspect ratio. Use resizing to make images bigger/smaller, cropping to change composition.
Should I maintain aspect ratio?
Yes, almost always! Maintaining aspect ratio prevents distortion - circles stay circles, people look normal. Only change aspect ratio if deliberately cropping to a different shape for specific requirements.
What image size is best for websites?
Depends on use. Hero images: 1920px wide max. Content images: 800-1200px wide. Thumbnails: 150-300px. Aim for under 200KB file size per image for fast loading. Use JPG for photos (smaller files), PNG for graphics with transparency.
What resolution (DPI) should I use?
Web images: 72 DPI is sufficient (screens can't display higher). Print: 300 DPI for quality prints. Our resizer focuses on pixel dimensions - DPI matters only for print, not web display.
Can I resize images without losing transparency?
Yes! Use PNG format, which supports transparency. Resizing maintains alpha channel (transparency). JPG doesn't support transparency - transparent areas become white or black when converted to JPG.
Is my image safe when using this tool?
Yes! All processing happens in your browser. Images aren't uploaded to our servers or any external service. Your images never leave your device, ensuring complete privacy and security.
What's the maximum image size I can resize?
Limited only by your browser's memory. Most browsers handle images up to 50-100 megapixels. Extremely large images (100MB+ files) may slow processing. For huge images, consider desktop software.
Use Cases
- Website Optimization: Reduce image file sizes for faster page loading. Resize hero images, product photos, and content images to web-appropriate dimensions and file sizes.
- Social Media Content: Resize images to exact platform requirements: Instagram posts (1080Ã1080), Facebook covers (820Ã312), Twitter headers (1500Ã500). Ensure perfect fit without cropping.
- Email Attachments: Reduce large photo file sizes for email sending. Stay under attachment limits while maintaining acceptable quality for sharing.
- Thumbnail Creation: Generate small preview images for galleries, product listings, or video thumbnails. Consistent thumbnail sizes improve layout and load times.
- Print Preparation: Resize images to specific print dimensions. Prepare photos for standard print sizes like 4Ã6, 5Ã7, or 8Ã10 inches at proper DPI.